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Home » Modeling » EMF "Technology" (Ecore Tools, EMFatic, etc)  » [Teneo] memory consumption keeps building up
[Teneo] memory consumption keeps building up [message #78399] Wed, 04 April 2007 14:19 Go to next message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
Hi,

Every time user creates a project in our application we initialize a new
database (embedded HSQLDB) and hence we have to initialize HbDataStore.
I have number of emf models and nearly 100mb is consumed on each
hbds.initialize();
Before user can create another project, existing opened(if any)
project/database is closed and session is cleared.

These are the steps done on close of project:


session.flush(); //session obtained from teneo
session.clear();
//here shutdown statement is issued for the db and then
session.disconnect();
session.close();
HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName is
session factory name
HbHelper.INSTANCE.closeAll();
sessionFactory.close(); //session factory obtained from teneo
Runtime runtime = Runtime.getRuntime();
runtime.gc();

But it seems that emf objects created during models initialization
remains in memory and so if user creates another project then again
100mb is consumed and hence shortly runs out of memory.

So just wondering do I have to do something more about clearing?

Any suggestions to fix it?

Thanks.
Parvez
Re: [Teneo] memory consumption keeps building up [message #78417 is a reply to message #78399] Wed, 04 April 2007 16:00 Go to previous messageGo to next message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
There is an ERuntime.INSTANCE which keeps track of mapping from the ecore to the java classes. But I
can't really imagine that this one is 100mb large. Also the same epackage can not be registered twice.

Internally the hbDataStore keeps a cross reference map which can take some space (but 100mb seems a
lot). This one is not cleared when doing close() on the datastore or the hbhelper. Is there still a
pointer somewhere to the old datastore?

Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying sessionfactory so I am surprised
that your sessionfactoru.close() works.

So if you create 5 hbdatastores and initialize them then 500Mb is used?

gr. Martin

PC wrote:
> Hi,
>
> Every time user creates a project in our application we initialize a new
> database (embedded HSQLDB) and hence we have to initialize HbDataStore.
> I have number of emf models and nearly 100mb is consumed on each
> hbds.initialize();
> Before user can create another project, existing opened(if any)
> project/database is closed and session is cleared.
>
> These are the steps done on close of project:
>
>
> session.flush(); //session obtained from teneo
> session.clear();
> //here shutdown statement is issued for the db and then
> session.disconnect();
> session.close();
> HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName is
> session factory name
> HbHelper.INSTANCE.closeAll();
> sessionFactory.close(); //session factory obtained from teneo
> Runtime runtime = Runtime.getRuntime();
> runtime.gc();
>
> But it seems that emf objects created during models initialization
> remains in memory and so if user creates another project then again
> 100mb is consumed and hence shortly runs out of memory.
>
> So just wondering do I have to do something more about clearing?
>
> Any suggestions to fix it?
>
> Thanks.
> Parvez


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #78430 is a reply to message #78417] Wed, 04 April 2007 16:20 Go to previous messageGo to next message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
Hi Martin,

yes, if I initialize 5 times then it goes to around 500mb or so.
SessionFactory close seems to work as I don't see any error, otherwise I
guess I would have seen "session is already closed" or something.

As per initialise time it used to take from 15 - 20 secs. But now I have
changed to use cacheableFile, so that have reduced to 7 - 10 seconds.

Regards,
Parvez

Martin Taal wrote:
> Hi Parvez,
> There is an ERuntime.INSTANCE which keeps track of mapping from the
> ecore to the java classes. But I can't really imagine that this one is
> 100mb large. Also the same epackage can not be registered twice.
>
> Internally the hbDataStore keeps a cross reference map which can take
> some space (but 100mb seems a lot). This one is not cleared when doing
> close() on the datastore or the hbhelper. Is there still a pointer
> somewhere to the old datastore?
>
> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
> sessionfactory so I am surprised that your sessionfactoru.close() works.
>
> So if you create 5 hbdatastores and initialize them then 500Mb is used?
>
> gr. Martin
>
> PC wrote:
>> Hi,
>>
>> Every time user creates a project in our application we initialize a
>> new database (embedded HSQLDB) and hence we have to initialize
>> HbDataStore.
>> I have number of emf models and nearly 100mb is consumed on each
>> hbds.initialize();
>> Before user can create another project, existing opened(if any)
>> project/database is closed and session is cleared.
>>
>> These are the steps done on close of project:
>>
>>
>> session.flush(); //session obtained from teneo
>> session.clear();
>> //here shutdown statement is issued for the db and then
>> session.disconnect();
>> session.close();
>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName is
>> session factory name
>> HbHelper.INSTANCE.closeAll();
>> sessionFactory.close(); //session factory obtained from teneo
>> Runtime runtime = Runtime.getRuntime();
>> runtime.gc();
>>
>> But it seems that emf objects created during models initialization
>> remains in memory and so if user creates another project then again
>> 100mb is consumed and hence shortly runs out of memory.
>>
>> So just wondering do I have to do something more about clearing?
>>
>> Any suggestions to fix it?
>>
>> Thanks.
>> Parvez
>
>
Re: [Teneo] memory consumption keeps building up [message #78445 is a reply to message #78430] Wed, 04 April 2007 16:31 Go to previous messageGo to next message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
How large is your model? Would the cross reference mapping cause the memory use (it is the referers
member in the HbDataStore)?

gr. Martin

PC wrote:
> Hi Martin,
>
> yes, if I initialize 5 times then it goes to around 500mb or so.
> SessionFactory close seems to work as I don't see any error, otherwise I
> guess I would have seen "session is already closed" or something.
>
> As per initialise time it used to take from 15 - 20 secs. But now I have
> changed to use cacheableFile, so that have reduced to 7 - 10 seconds.
>
> Regards,
> Parvez
>
> Martin Taal wrote:
>> Hi Parvez,
>> There is an ERuntime.INSTANCE which keeps track of mapping from the
>> ecore to the java classes. But I can't really imagine that this one is
>> 100mb large. Also the same epackage can not be registered twice.
>>
>> Internally the hbDataStore keeps a cross reference map which can take
>> some space (but 100mb seems a lot). This one is not cleared when doing
>> close() on the datastore or the hbhelper. Is there still a pointer
>> somewhere to the old datastore?
>>
>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>> sessionfactory so I am surprised that your sessionfactoru.close() works.
>>
>> So if you create 5 hbdatastores and initialize them then 500Mb is used?
>>
>> gr. Martin
>>
>> PC wrote:
>>> Hi,
>>>
>>> Every time user creates a project in our application we initialize a
>>> new database (embedded HSQLDB) and hence we have to initialize
>>> HbDataStore.
>>> I have number of emf models and nearly 100mb is consumed on each
>>> hbds.initialize();
>>> Before user can create another project, existing opened(if any)
>>> project/database is closed and session is cleared.
>>>
>>> These are the steps done on close of project:
>>>
>>>
>>> session.flush(); //session obtained from teneo
>>> session.clear();
>>> //here shutdown statement is issued for the db and then
>>> session.disconnect();
>>> session.close();
>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName
>>> is session factory name
>>> HbHelper.INSTANCE.closeAll();
>>> sessionFactory.close(); //session factory obtained from teneo
>>> Runtime runtime = Runtime.getRuntime();
>>> runtime.gc();
>>>
>>> But it seems that emf objects created during models initialization
>>> remains in memory and so if user creates another project then again
>>> 100mb is consumed and hence shortly runs out of memory.
>>>
>>> So just wondering do I have to do something more about clearing?
>>>
>>> Any suggestions to fix it?
>>>
>>> Thanks.
>>> Parvez
>>
>>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #78533 is a reply to message #78445] Thu, 05 April 2007 16:38 Go to previous messageGo to next message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
This is a multi-part message in MIME format.
--------------020203090904040504070308
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Hi Martin,

I did some more investigation, and it looks that it is referers () field
of HbDataStore. By the time I created 6 projects, it went upto 483mb.

I am enclosing some profiler snapshots in zip file for your consideration.

- Parvez

Martin Taal wrote:
> Hi Parvez,
> How large is your model? Would the cross reference mapping cause the
> memory use (it is the referers member in the HbDataStore)?
>
> gr. Martin
>
> PC wrote:
>> Hi Martin,
>>
>> yes, if I initialize 5 times then it goes to around 500mb or so.
>> SessionFactory close seems to work as I don't see any error, otherwise
>> I guess I would have seen "session is already closed" or something.
>>
>> As per initialise time it used to take from 15 - 20 secs. But now I
>> have changed to use cacheableFile, so that have reduced to 7 - 10
>> seconds.
>>
>> Regards,
>> Parvez
>>
>> Martin Taal wrote:
>>> Hi Parvez,
>>> There is an ERuntime.INSTANCE which keeps track of mapping from the
>>> ecore to the java classes. But I can't really imagine that this one
>>> is 100mb large. Also the same epackage can not be registered twice.
>>>
>>> Internally the hbDataStore keeps a cross reference map which can take
>>> some space (but 100mb seems a lot). This one is not cleared when
>>> doing close() on the datastore or the hbhelper. Is there still a
>>> pointer somewhere to the old datastore?
>>>
>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>> sessionfactory so I am surprised that your sessionfactoru.close() works.
>>>
>>> So if you create 5 hbdatastores and initialize them then 500Mb is used?
>>>
>>> gr. Martin
>>>
>>> PC wrote:
>>>> Hi,
>>>>
>>>> Every time user creates a project in our application we initialize a
>>>> new database (embedded HSQLDB) and hence we have to initialize
>>>> HbDataStore.
>>>> I have number of emf models and nearly 100mb is consumed on each
>>>> hbds.initialize();
>>>> Before user can create another project, existing opened(if any)
>>>> project/database is closed and session is cleared.
>>>>
>>>> These are the steps done on close of project:
>>>>
>>>>
>>>> session.flush(); //session obtained from teneo
>>>> session.clear();
>>>> //here shutdown statement is issued for the db and then
>>>> session.disconnect();
>>>> session.close();
>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName
>>>> is session factory name
>>>> HbHelper.INSTANCE.closeAll();
>>>> sessionFactory.close(); //session factory obtained from
>>>> teneo
>>>> Runtime runtime = Runtime.getRuntime();
>>>> runtime.gc();
>>>>
>>>> But it seems that emf objects created during models initialization
>>>> remains in memory and so if user creates another project then again
>>>> 100mb is consumed and hence shortly runs out of memory.
>>>>
>>>> So just wondering do I have to do something more about clearing?
>>>>
>>>> Any suggestions to fix it?
>>>>
>>>> Thanks.
>>>> Parvez
>>>
>>>
>
>


--------------020203090904040504070308
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name="datastore.zip"
Content-Transfer-Encoding: base64
Content-Disposition: inline;
filename="datastore.zip"

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Re: [Teneo] memory consumption keeps building up [message #78552 is a reply to message #78533] Thu, 05 April 2007 16:44 Go to previous messageGo to next message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
oh yes forgot to mention, that your guess was right that it is referers
field ;-)


PC wrote:
> Hi Martin,
>
> I did some more investigation, and it looks that it is referers () field
> of HbDataStore. By the time I created 6 projects, it went upto 483mb.
>
> I am enclosing some profiler snapshots in zip file for your consideration.
>
> - Parvez
>
> Martin Taal wrote:
>> Hi Parvez,
>> How large is your model? Would the cross reference mapping cause the
>> memory use (it is the referers member in the HbDataStore)?
>>
>> gr. Martin
>>
>> PC wrote:
>>> Hi Martin,
>>>
>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>> SessionFactory close seems to work as I don't see any error,
>>> otherwise I guess I would have seen "session is already closed" or
>>> something.
>>>
>>> As per initialise time it used to take from 15 - 20 secs. But now I
>>> have changed to use cacheableFile, so that have reduced to 7 - 10
>>> seconds.
>>>
>>> Regards,
>>> Parvez
>>>
>>> Martin Taal wrote:
>>>> Hi Parvez,
>>>> There is an ERuntime.INSTANCE which keeps track of mapping from the
>>>> ecore to the java classes. But I can't really imagine that this one
>>>> is 100mb large. Also the same epackage can not be registered twice.
>>>>
>>>> Internally the hbDataStore keeps a cross reference map which can
>>>> take some space (but 100mb seems a lot). This one is not cleared
>>>> when doing close() on the datastore or the hbhelper. Is there still
>>>> a pointer somewhere to the old datastore?
>>>>
>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>>> sessionfactory so I am surprised that your sessionfactoru.close()
>>>> works.
>>>>
>>>> So if you create 5 hbdatastores and initialize them then 500Mb is used?
>>>>
>>>> gr. Martin
>>>>
>>>> PC wrote:
>>>>> Hi,
>>>>>
>>>>> Every time user creates a project in our application we initialize
>>>>> a new database (embedded HSQLDB) and hence we have to initialize
>>>>> HbDataStore.
>>>>> I have number of emf models and nearly 100mb is consumed on each
>>>>> hbds.initialize();
>>>>> Before user can create another project, existing opened(if any)
>>>>> project/database is closed and session is cleared.
>>>>>
>>>>> These are the steps done on close of project:
>>>>>
>>>>>
>>>>> session.flush(); //session obtained from teneo
>>>>> session.clear();
>>>>> //here shutdown statement is issued for the db and then
>>>>> session.disconnect();
>>>>> session.close();
>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName
>>>>> is session factory name
>>>>> HbHelper.INSTANCE.closeAll();
>>>>> sessionFactory.close(); //session factory obtained from
>>>>> teneo
>>>>> Runtime runtime = Runtime.getRuntime();
>>>>> runtime.gc();
>>>>>
>>>>> But it seems that emf objects created during models initialization
>>>>> remains in memory and so if user creates another project then again
>>>>> 100mb is consumed and hence shortly runs out of memory.
>>>>>
>>>>> So just wondering do I have to do something more about clearing?
>>>>>
>>>>> Any suggestions to fix it?
>>>>>
>>>>> Thanks.
>>>>> Parvez
>>>>
>>>>
>>
>>
>
Re: [Teneo] memory consumption keeps building up [message #78566 is a reply to message #78552] Thu, 05 April 2007 17:23 Go to previous messageGo to next message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Thanks :-)

The referers field is only used after initialization to support cross-reference queries. If this is
not a requirement then it can be cleared. The only problem on the short term is that it is not
possible to clear it by subclassing hbdatastore. I will change this in cvs so then the build of the
referers hashmap can be prevented.

Btw, do you have an idea why there is still a reference to the closed hbdatastores, there must be a
reference to them otherwise it would also be gc-ed.

gr. Martin

PC wrote:
> oh yes forgot to mention, that your guess was right that it is referers
> field ;-)
>
>
> PC wrote:
>> Hi Martin,
>>
>> I did some more investigation, and it looks that it is referers ()
>> field of HbDataStore. By the time I created 6 projects, it went upto
>> 483mb.
>>
>> I am enclosing some profiler snapshots in zip file for your
>> consideration.
>>
>> - Parvez
>>
>> Martin Taal wrote:
>>> Hi Parvez,
>>> How large is your model? Would the cross reference mapping cause the
>>> memory use (it is the referers member in the HbDataStore)?
>>>
>>> gr. Martin
>>>
>>> PC wrote:
>>>> Hi Martin,
>>>>
>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>> SessionFactory close seems to work as I don't see any error,
>>>> otherwise I guess I would have seen "session is already closed" or
>>>> something.
>>>>
>>>> As per initialise time it used to take from 15 - 20 secs. But now I
>>>> have changed to use cacheableFile, so that have reduced to 7 - 10
>>>> seconds.
>>>>
>>>> Regards,
>>>> Parvez
>>>>
>>>> Martin Taal wrote:
>>>>> Hi Parvez,
>>>>> There is an ERuntime.INSTANCE which keeps track of mapping from the
>>>>> ecore to the java classes. But I can't really imagine that this one
>>>>> is 100mb large. Also the same epackage can not be registered twice.
>>>>>
>>>>> Internally the hbDataStore keeps a cross reference map which can
>>>>> take some space (but 100mb seems a lot). This one is not cleared
>>>>> when doing close() on the datastore or the hbhelper. Is there still
>>>>> a pointer somewhere to the old datastore?
>>>>>
>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>>>> sessionfactory so I am surprised that your sessionfactoru.close()
>>>>> works.
>>>>>
>>>>> So if you create 5 hbdatastores and initialize them then 500Mb is
>>>>> used?
>>>>>
>>>>> gr. Martin
>>>>>
>>>>> PC wrote:
>>>>>> Hi,
>>>>>>
>>>>>> Every time user creates a project in our application we initialize
>>>>>> a new database (embedded HSQLDB) and hence we have to initialize
>>>>>> HbDataStore.
>>>>>> I have number of emf models and nearly 100mb is consumed on each
>>>>>> hbds.initialize();
>>>>>> Before user can create another project, existing opened(if any)
>>>>>> project/database is closed and session is cleared.
>>>>>>
>>>>>> These are the steps done on close of project:
>>>>>>
>>>>>>
>>>>>> session.flush(); //session obtained from teneo
>>>>>> session.clear();
>>>>>> //here shutdown statement is issued for the db and then
>>>>>> session.disconnect();
>>>>>> session.close();
>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>> _dbName is session factory name
>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>> sessionFactory.close(); //session factory obtained from
>>>>>> teneo
>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>> runtime.gc();
>>>>>>
>>>>>> But it seems that emf objects created during models initialization
>>>>>> remains in memory and so if user creates another project then
>>>>>> again 100mb is consumed and hence shortly runs out of memory.
>>>>>>
>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>
>>>>>> Any suggestions to fix it?
>>>>>>
>>>>>> Thanks.
>>>>>> Parvez
>>>>>
>>>>>
>>>
>>>
>>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #78640 is a reply to message #78566] Fri, 06 April 2007 08:48 Go to previous messageGo to next message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
Hi Martin,

I don't think that I am keeping the ref to old datastore.
Not sure, but from deep size calculation of referers field, it looks
that it may be keeping ref to some old objects. So in one instance of
HbDataStore's referers field's keySet calculates to that much size.

- Parvez

Martin Taal wrote:
> Thanks :-)
>
> The referers field is only used after initialization to support
> cross-reference queries. If this is not a requirement then it can be
> cleared. The only problem on the short term is that it is not possible
> to clear it by subclassing hbdatastore. I will change this in cvs so
> then the build of the referers hashmap can be prevented.
>
> Btw, do you have an idea why there is still a reference to the closed
> hbdatastores, there must be a reference to them otherwise it would also
> be gc-ed.
>
> gr. Martin
>
> PC wrote:
>> oh yes forgot to mention, that your guess was right that it is
>> referers field ;-)
>>
>>
>> PC wrote:
>>> Hi Martin,
>>>
>>> I did some more investigation, and it looks that it is referers ()
>>> field of HbDataStore. By the time I created 6 projects, it went
>>> upto 483mb.
>>>
>>> I am enclosing some profiler snapshots in zip file for your
>>> consideration.
>>>
>>> - Parvez
>>>
>>> Martin Taal wrote:
>>>> Hi Parvez,
>>>> How large is your model? Would the cross reference mapping cause the
>>>> memory use (it is the referers member in the HbDataStore)?
>>>>
>>>> gr. Martin
>>>>
>>>> PC wrote:
>>>>> Hi Martin,
>>>>>
>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>> SessionFactory close seems to work as I don't see any error,
>>>>> otherwise I guess I would have seen "session is already closed" or
>>>>> something.
>>>>>
>>>>> As per initialise time it used to take from 15 - 20 secs. But now I
>>>>> have changed to use cacheableFile, so that have reduced to 7 - 10
>>>>> seconds.
>>>>>
>>>>> Regards,
>>>>> Parvez
>>>>>
>>>>> Martin Taal wrote:
>>>>>> Hi Parvez,
>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping from
>>>>>> the ecore to the java classes. But I can't really imagine that
>>>>>> this one is 100mb large. Also the same epackage can not be
>>>>>> registered twice.
>>>>>>
>>>>>> Internally the hbDataStore keeps a cross reference map which can
>>>>>> take some space (but 100mb seems a lot). This one is not cleared
>>>>>> when doing close() on the datastore or the hbhelper. Is there
>>>>>> still a pointer somewhere to the old datastore?
>>>>>>
>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>>>>> sessionfactory so I am surprised that your sessionfactoru.close()
>>>>>> works.
>>>>>>
>>>>>> So if you create 5 hbdatastores and initialize them then 500Mb is
>>>>>> used?
>>>>>>
>>>>>> gr. Martin
>>>>>>
>>>>>> PC wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> Every time user creates a project in our application we
>>>>>>> initialize a new database (embedded HSQLDB) and hence we have to
>>>>>>> initialize HbDataStore.
>>>>>>> I have number of emf models and nearly 100mb is consumed on each
>>>>>>> hbds.initialize();
>>>>>>> Before user can create another project, existing opened(if any)
>>>>>>> project/database is closed and session is cleared.
>>>>>>>
>>>>>>> These are the steps done on close of project:
>>>>>>>
>>>>>>>
>>>>>>> session.flush(); //session obtained from teneo
>>>>>>> session.clear();
>>>>>>> //here shutdown statement is issued for the db and then
>>>>>>> session.disconnect();
>>>>>>> session.close();
>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>> _dbName is session factory name
>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>> sessionFactory.close(); //session factory obtained
>>>>>>> from teneo
>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>> runtime.gc();
>>>>>>>
>>>>>>> But it seems that emf objects created during models
>>>>>>> initialization remains in memory and so if user creates another
>>>>>>> project then again 100mb is consumed and hence shortly runs out
>>>>>>> of memory.
>>>>>>>
>>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>>
>>>>>>> Any suggestions to fix it?
>>>>>>>
>>>>>>> Thanks.
>>>>>>> Parvez
>>>>>>
>>>>>>
>>>>
>>>>
>>>
>
>
Re: [Teneo] memory consumption keeps building up [message #78792 is a reply to message #78640] Fri, 06 April 2007 21:41 Go to previous messageGo to next message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
I just noticed the closeAll method in the HbHelper does not clear the
HbHelper.dataStoreByPersistentClass map. This is at least one reason that the hbdatastore is not gc-ed.
I have entered a bugzilla for this. This will be solved in the next release.

As a workaround you can try the HbHelper.deRegisterDataStore method. This one should remove the
references to the datastore from both internal HbHelper maps.

gr. Martin

PC wrote:
> Hi Martin,
>
> I don't think that I am keeping the ref to old datastore.
> Not sure, but from deep size calculation of referers field, it looks
> that it may be keeping ref to some old objects. So in one instance of
> HbDataStore's referers field's keySet calculates to that much size.
>
> - Parvez
>
> Martin Taal wrote:
>> Thanks :-)
>>
>> The referers field is only used after initialization to support
>> cross-reference queries. If this is not a requirement then it can be
>> cleared. The only problem on the short term is that it is not possible
>> to clear it by subclassing hbdatastore. I will change this in cvs so
>> then the build of the referers hashmap can be prevented.
>>
>> Btw, do you have an idea why there is still a reference to the closed
>> hbdatastores, there must be a reference to them otherwise it would
>> also be gc-ed.
>>
>> gr. Martin
>>
>> PC wrote:
>>> oh yes forgot to mention, that your guess was right that it is
>>> referers field ;-)
>>>
>>>
>>> PC wrote:
>>>> Hi Martin,
>>>>
>>>> I did some more investigation, and it looks that it is referers ()
>>>> field of HbDataStore. By the time I created 6 projects, it went
>>>> upto 483mb.
>>>>
>>>> I am enclosing some profiler snapshots in zip file for your
>>>> consideration.
>>>>
>>>> - Parvez
>>>>
>>>> Martin Taal wrote:
>>>>> Hi Parvez,
>>>>> How large is your model? Would the cross reference mapping cause
>>>>> the memory use (it is the referers member in the HbDataStore)?
>>>>>
>>>>> gr. Martin
>>>>>
>>>>> PC wrote:
>>>>>> Hi Martin,
>>>>>>
>>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>> otherwise I guess I would have seen "session is already closed" or
>>>>>> something.
>>>>>>
>>>>>> As per initialise time it used to take from 15 - 20 secs. But now
>>>>>> I have changed to use cacheableFile, so that have reduced to 7 -
>>>>>> 10 seconds.
>>>>>>
>>>>>> Regards,
>>>>>> Parvez
>>>>>>
>>>>>> Martin Taal wrote:
>>>>>>> Hi Parvez,
>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping from
>>>>>>> the ecore to the java classes. But I can't really imagine that
>>>>>>> this one is 100mb large. Also the same epackage can not be
>>>>>>> registered twice.
>>>>>>>
>>>>>>> Internally the hbDataStore keeps a cross reference map which can
>>>>>>> take some space (but 100mb seems a lot). This one is not cleared
>>>>>>> when doing close() on the datastore or the hbhelper. Is there
>>>>>>> still a pointer somewhere to the old datastore?
>>>>>>>
>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>>>>>> sessionfactory so I am surprised that your sessionfactoru.close()
>>>>>>> works.
>>>>>>>
>>>>>>> So if you create 5 hbdatastores and initialize them then 500Mb is
>>>>>>> used?
>>>>>>>
>>>>>>> gr. Martin
>>>>>>>
>>>>>>> PC wrote:
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> Every time user creates a project in our application we
>>>>>>>> initialize a new database (embedded HSQLDB) and hence we have to
>>>>>>>> initialize HbDataStore.
>>>>>>>> I have number of emf models and nearly 100mb is consumed on each
>>>>>>>> hbds.initialize();
>>>>>>>> Before user can create another project, existing opened(if any)
>>>>>>>> project/database is closed and session is cleared.
>>>>>>>>
>>>>>>>> These are the steps done on close of project:
>>>>>>>>
>>>>>>>>
>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>> session.clear();
>>>>>>>> //here shutdown statement is issued for the db and then
>>>>>>>> session.disconnect();
>>>>>>>> session.close();
>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>>> _dbName is session factory name
>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>> sessionFactory.close(); //session factory obtained
>>>>>>>> from teneo
>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>> runtime.gc();
>>>>>>>>
>>>>>>>> But it seems that emf objects created during models
>>>>>>>> initialization remains in memory and so if user creates another
>>>>>>>> project then again 100mb is consumed and hence shortly runs out
>>>>>>>> of memory.
>>>>>>>>
>>>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>>>
>>>>>>>> Any suggestions to fix it?
>>>>>>>>
>>>>>>>> Thanks.
>>>>>>>> Parvez
>>>>>>>
>>>>>>>
>>>>>
>>>>>
>>>>
>>
>>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #78969 is a reply to message #78792] Tue, 10 April 2007 08:49 Go to previous messageGo to next message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
Thanks Martin.

Yes, I did add following but didn't help.


Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap( ).remove(_dbName);

Resource.Factory.Registry.INSTANCE.getProtocolToFactoryMap() .remove(HIBERNATE);


HbHelper.INSTANCE.deRegisterDataStore(_dbName);
HbHelper.INSTANCE.deRegisterDataStore(HIBERNATE);


Earlier you mentioned that

"referers field is only used after initialization to support
cross-reference queries. If this is not a requirement then it can be
cleared"

so just wondering (short term/quick solution) if computeReferers()
returns null or empty hashmap (though I know it is private at the moment
and can't be overridden) then that should solve the problem, is it?, any
other issues if you can think of?

At present, I am using 0.7.5, as you were saying fix in next release,
any idea when that could be?

Thanks.

- Parvez



Martin Taal wrote:
> Hi Parvez,
> I just noticed the closeAll method in the HbHelper does not clear the
> HbHelper.dataStoreByPersistentClass map. This is at least one reason
> that the hbdatastore is not gc-ed.
> I have entered a bugzilla for this. This will be solved in the next
> release.
>
> As a workaround you can try the HbHelper.deRegisterDataStore method.
> This one should remove the references to the datastore from both
> internal HbHelper maps.
>
> gr. Martin
>
> PC wrote:
>> Hi Martin,
>>
>> I don't think that I am keeping the ref to old datastore.
>> Not sure, but from deep size calculation of referers field, it looks
>> that it may be keeping ref to some old objects. So in one instance of
>> HbDataStore's referers field's keySet calculates to that much size.
>>
>> - Parvez
>>
>> Martin Taal wrote:
>>> Thanks :-)
>>>
>>> The referers field is only used after initialization to support
>>> cross-reference queries. If this is not a requirement then it can be
>>> cleared. The only problem on the short term is that it is not
>>> possible to clear it by subclassing hbdatastore. I will change this
>>> in cvs so then the build of the referers hashmap can be prevented.
>>>
>>> Btw, do you have an idea why there is still a reference to the closed
>>> hbdatastores, there must be a reference to them otherwise it would
>>> also be gc-ed.
>>>
>>> gr. Martin
>>>
>>> PC wrote:
>>>> oh yes forgot to mention, that your guess was right that it is
>>>> referers field ;-)
>>>>
>>>>
>>>> PC wrote:
>>>>> Hi Martin,
>>>>>
>>>>> I did some more investigation, and it looks that it is referers ()
>>>>> field of HbDataStore. By the time I created 6 projects, it went
>>>>> upto 483mb.
>>>>>
>>>>> I am enclosing some profiler snapshots in zip file for your
>>>>> consideration.
>>>>>
>>>>> - Parvez
>>>>>
>>>>> Martin Taal wrote:
>>>>>> Hi Parvez,
>>>>>> How large is your model? Would the cross reference mapping cause
>>>>>> the memory use (it is the referers member in the HbDataStore)?
>>>>>>
>>>>>> gr. Martin
>>>>>>
>>>>>> PC wrote:
>>>>>>> Hi Martin,
>>>>>>>
>>>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>>> otherwise I guess I would have seen "session is already closed"
>>>>>>> or something.
>>>>>>>
>>>>>>> As per initialise time it used to take from 15 - 20 secs. But now
>>>>>>> I have changed to use cacheableFile, so that have reduced to 7 -
>>>>>>> 10 seconds.
>>>>>>>
>>>>>>> Regards,
>>>>>>> Parvez
>>>>>>>
>>>>>>> Martin Taal wrote:
>>>>>>>> Hi Parvez,
>>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping from
>>>>>>>> the ecore to the java classes. But I can't really imagine that
>>>>>>>> this one is 100mb large. Also the same epackage can not be
>>>>>>>> registered twice.
>>>>>>>>
>>>>>>>> Internally the hbDataStore keeps a cross reference map which can
>>>>>>>> take some space (but 100mb seems a lot). This one is not cleared
>>>>>>>> when doing close() on the datastore or the hbhelper. Is there
>>>>>>>> still a pointer somewhere to the old datastore?
>>>>>>>>
>>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>>>>>>> sessionfactory so I am surprised that your
>>>>>>>> sessionfactoru.close() works.
>>>>>>>>
>>>>>>>> So if you create 5 hbdatastores and initialize them then 500Mb
>>>>>>>> is used?
>>>>>>>>
>>>>>>>> gr. Martin
>>>>>>>>
>>>>>>>> PC wrote:
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>> Every time user creates a project in our application we
>>>>>>>>> initialize a new database (embedded HSQLDB) and hence we have
>>>>>>>>> to initialize HbDataStore.
>>>>>>>>> I have number of emf models and nearly 100mb is consumed on
>>>>>>>>> each hbds.initialize();
>>>>>>>>> Before user can create another project, existing opened(if any)
>>>>>>>>> project/database is closed and session is cleared.
>>>>>>>>>
>>>>>>>>> These are the steps done on close of project:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>>> session.clear();
>>>>>>>>> //here shutdown statement is issued for the db and then
>>>>>>>>> session.disconnect();
>>>>>>>>> session.close();
>>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>>>> _dbName is session factory name
>>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>>> sessionFactory.close(); //session factory obtained
>>>>>>>>> from teneo
>>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>>> runtime.gc();
>>>>>>>>>
>>>>>>>>> But it seems that emf objects created during models
>>>>>>>>> initialization remains in memory and so if user creates another
>>>>>>>>> project then again 100mb is consumed and hence shortly runs out
>>>>>>>>> of memory.
>>>>>>>>>
>>>>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>>>>
>>>>>>>>> Any suggestions to fix it?
>>>>>>>>>
>>>>>>>>> Thanks.
>>>>>>>>> Parvez
>>>>>>>>
>>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>
>>>
>
>
Re: [Teneo] memory consumption keeps building up [message #79038 is a reply to message #78969] Tue, 10 April 2007 09:27 Go to previous messageGo to next message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
Afaiu the issue is that there is still a reference to the hbdatastore somewhere. The deregister
should solve the references from the statics of Teneo. You can also try to set all references to the
sessionfactory to null before gc-ing. Can you analyse if there are other references to the datastore
instance?

Yes, I have made the computeReferers method protected in cvs. Although overriding the
computereferers method only resolves the symptom.
I aim to do a next release early next week.

gr. Martin

PC wrote:
> Thanks Martin.
>
> Yes, I did add following but didn't help.
>
>
> Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap( ).remove(_dbName);
>
> Resource.Factory.Registry.INSTANCE.getProtocolToFactoryMap() .remove(HIBERNATE);
>
>
> HbHelper.INSTANCE.deRegisterDataStore(_dbName);
> HbHelper.INSTANCE.deRegisterDataStore(HIBERNATE);
>
>
> Earlier you mentioned that
>
> "referers field is only used after initialization to support
> cross-reference queries. If this is not a requirement then it can be
> cleared"
>
> so just wondering (short term/quick solution) if computeReferers()
> returns null or empty hashmap (though I know it is private at the moment
> and can't be overridden) then that should solve the problem, is it?, any
> other issues if you can think of?
>
> At present, I am using 0.7.5, as you were saying fix in next release,
> any idea when that could be?
>
> Thanks.
>
> - Parvez
>
>
>
> Martin Taal wrote:
>> Hi Parvez,
>> I just noticed the closeAll method in the HbHelper does not clear the
>> HbHelper.dataStoreByPersistentClass map. This is at least one reason
>> that the hbdatastore is not gc-ed.
>> I have entered a bugzilla for this. This will be solved in the next
>> release.
>>
>> As a workaround you can try the HbHelper.deRegisterDataStore method.
>> This one should remove the references to the datastore from both
>> internal HbHelper maps.
>>
>> gr. Martin
>>
>> PC wrote:
>>> Hi Martin,
>>>
>>> I don't think that I am keeping the ref to old datastore.
>>> Not sure, but from deep size calculation of referers field, it looks
>>> that it may be keeping ref to some old objects. So in one instance of
>>> HbDataStore's referers field's keySet calculates to that much size.
>>>
>>> - Parvez
>>>
>>> Martin Taal wrote:
>>>> Thanks :-)
>>>>
>>>> The referers field is only used after initialization to support
>>>> cross-reference queries. If this is not a requirement then it can be
>>>> cleared. The only problem on the short term is that it is not
>>>> possible to clear it by subclassing hbdatastore. I will change this
>>>> in cvs so then the build of the referers hashmap can be prevented.
>>>>
>>>> Btw, do you have an idea why there is still a reference to the
>>>> closed hbdatastores, there must be a reference to them otherwise it
>>>> would also be gc-ed.
>>>>
>>>> gr. Martin
>>>>
>>>> PC wrote:
>>>>> oh yes forgot to mention, that your guess was right that it is
>>>>> referers field ;-)
>>>>>
>>>>>
>>>>> PC wrote:
>>>>>> Hi Martin,
>>>>>>
>>>>>> I did some more investigation, and it looks that it is referers ()
>>>>>> field of HbDataStore. By the time I created 6 projects, it went
>>>>>> upto 483mb.
>>>>>>
>>>>>> I am enclosing some profiler snapshots in zip file for your
>>>>>> consideration.
>>>>>>
>>>>>> - Parvez
>>>>>>
>>>>>> Martin Taal wrote:
>>>>>>> Hi Parvez,
>>>>>>> How large is your model? Would the cross reference mapping cause
>>>>>>> the memory use (it is the referers member in the HbDataStore)?
>>>>>>>
>>>>>>> gr. Martin
>>>>>>>
>>>>>>> PC wrote:
>>>>>>>> Hi Martin,
>>>>>>>>
>>>>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>>>> otherwise I guess I would have seen "session is already closed"
>>>>>>>> or something.
>>>>>>>>
>>>>>>>> As per initialise time it used to take from 15 - 20 secs. But
>>>>>>>> now I have changed to use cacheableFile, so that have reduced to
>>>>>>>> 7 - 10 seconds.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Parvez
>>>>>>>>
>>>>>>>> Martin Taal wrote:
>>>>>>>>> Hi Parvez,
>>>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping from
>>>>>>>>> the ecore to the java classes. But I can't really imagine that
>>>>>>>>> this one is 100mb large. Also the same epackage can not be
>>>>>>>>> registered twice.
>>>>>>>>>
>>>>>>>>> Internally the hbDataStore keeps a cross reference map which
>>>>>>>>> can take some space (but 100mb seems a lot). This one is not
>>>>>>>>> cleared when doing close() on the datastore or the hbhelper. Is
>>>>>>>>> there still a pointer somewhere to the old datastore?
>>>>>>>>>
>>>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the
>>>>>>>>> underlying sessionfactory so I am surprised that your
>>>>>>>>> sessionfactoru.close() works.
>>>>>>>>>
>>>>>>>>> So if you create 5 hbdatastores and initialize them then 500Mb
>>>>>>>>> is used?
>>>>>>>>>
>>>>>>>>> gr. Martin
>>>>>>>>>
>>>>>>>>> PC wrote:
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> Every time user creates a project in our application we
>>>>>>>>>> initialize a new database (embedded HSQLDB) and hence we have
>>>>>>>>>> to initialize HbDataStore.
>>>>>>>>>> I have number of emf models and nearly 100mb is consumed on
>>>>>>>>>> each hbds.initialize();
>>>>>>>>>> Before user can create another project, existing opened(if
>>>>>>>>>> any) project/database is closed and session is cleared.
>>>>>>>>>>
>>>>>>>>>> These are the steps done on close of project:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>>>> session.clear();
>>>>>>>>>> //here shutdown statement is issued for the db and then
>>>>>>>>>> session.disconnect();
>>>>>>>>>> session.close();
>>>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>>>>> _dbName is session factory name
>>>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>>>> sessionFactory.close(); //session factory obtained
>>>>>>>>>> from teneo
>>>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>>>> runtime.gc();
>>>>>>>>>>
>>>>>>>>>> But it seems that emf objects created during models
>>>>>>>>>> initialization remains in memory and so if user creates
>>>>>>>>>> another project then again 100mb is consumed and hence shortly
>>>>>>>>>> runs out of memory.
>>>>>>>>>>
>>>>>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>>>>>
>>>>>>>>>> Any suggestions to fix it?
>>>>>>>>>>
>>>>>>>>>> Thanks.
>>>>>>>>>> Parvez
>>>>>>>>>
>>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>
>>>>
>>
>>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #79556 is a reply to message #79038] Thu, 12 April 2007 09:45 Go to previous messageGo to next message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
Hi Martin,

I think thats because of HbDataStore$ReferenceTo.

2nd Time: 69 instances of
org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
Deep size 122 MB


3rd Time: 138 instances of
org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
Deep size 213 MB

Regards,
Parvez


Martin Taal wrote:
> Hi Parvez,
> Afaiu the issue is that there is still a reference to the hbdatastore
> somewhere. The deregister should solve the references from the statics
> of Teneo. You can also try to set all references to the sessionfactory
> to null before gc-ing. Can you analyse if there are other references to
> the datastore instance?
>
> Yes, I have made the computeReferers method protected in cvs. Although
> overriding the computereferers method only resolves the symptom.
> I aim to do a next release early next week.
>
> gr. Martin
>
> PC wrote:
>> Thanks Martin.
>>
>> Yes, I did add following but didn't help.
>>
>>
>> Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap( ).remove(_dbName);
>>
>> Resource.Factory.Registry.INSTANCE.getProtocolToFactoryMap() .remove(HIBERNATE);
>>
>>
>> HbHelper.INSTANCE.deRegisterDataStore(_dbName);
>> HbHelper.INSTANCE.deRegisterDataStore(HIBERNATE);
>>
>>
>> Earlier you mentioned that
>>
>> "referers field is only used after initialization to support
>> cross-reference queries. If this is not a requirement then it can be
>> cleared"
>>
>> so just wondering (short term/quick solution) if computeReferers()
>> returns null or empty hashmap (though I know it is private at the
>> moment and can't be overridden) then that should solve the problem, is
>> it?, any other issues if you can think of?
>>
>> At present, I am using 0.7.5, as you were saying fix in next release,
>> any idea when that could be?
>>
>> Thanks.
>>
>> - Parvez
>>
>>
>>
>> Martin Taal wrote:
>>> Hi Parvez,
>>> I just noticed the closeAll method in the HbHelper does not clear the
>>> HbHelper.dataStoreByPersistentClass map. This is at least one reason
>>> that the hbdatastore is not gc-ed.
>>> I have entered a bugzilla for this. This will be solved in the next
>>> release.
>>>
>>> As a workaround you can try the HbHelper.deRegisterDataStore method.
>>> This one should remove the references to the datastore from both
>>> internal HbHelper maps.
>>>
>>> gr. Martin
>>>
>>> PC wrote:
>>>> Hi Martin,
>>>>
>>>> I don't think that I am keeping the ref to old datastore.
>>>> Not sure, but from deep size calculation of referers field, it looks
>>>> that it may be keeping ref to some old objects. So in one instance
>>>> of HbDataStore's referers field's keySet calculates to that much size.
>>>>
>>>> - Parvez
>>>>
>>>> Martin Taal wrote:
>>>>> Thanks :-)
>>>>>
>>>>> The referers field is only used after initialization to support
>>>>> cross-reference queries. If this is not a requirement then it can
>>>>> be cleared. The only problem on the short term is that it is not
>>>>> possible to clear it by subclassing hbdatastore. I will change this
>>>>> in cvs so then the build of the referers hashmap can be prevented.
>>>>>
>>>>> Btw, do you have an idea why there is still a reference to the
>>>>> closed hbdatastores, there must be a reference to them otherwise it
>>>>> would also be gc-ed.
>>>>>
>>>>> gr. Martin
>>>>>
>>>>> PC wrote:
>>>>>> oh yes forgot to mention, that your guess was right that it is
>>>>>> referers field ;-)
>>>>>>
>>>>>>
>>>>>> PC wrote:
>>>>>>> Hi Martin,
>>>>>>>
>>>>>>> I did some more investigation, and it looks that it is referers
>>>>>>> () field of HbDataStore. By the time I created 6 projects, it
>>>>>>> went upto 483mb.
>>>>>>>
>>>>>>> I am enclosing some profiler snapshots in zip file for your
>>>>>>> consideration.
>>>>>>>
>>>>>>> - Parvez
>>>>>>>
>>>>>>> Martin Taal wrote:
>>>>>>>> Hi Parvez,
>>>>>>>> How large is your model? Would the cross reference mapping cause
>>>>>>>> the memory use (it is the referers member in the HbDataStore)?
>>>>>>>>
>>>>>>>> gr. Martin
>>>>>>>>
>>>>>>>> PC wrote:
>>>>>>>>> Hi Martin,
>>>>>>>>>
>>>>>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>>>>> otherwise I guess I would have seen "session is already closed"
>>>>>>>>> or something.
>>>>>>>>>
>>>>>>>>> As per initialise time it used to take from 15 - 20 secs. But
>>>>>>>>> now I have changed to use cacheableFile, so that have reduced
>>>>>>>>> to 7 - 10 seconds.
>>>>>>>>>
>>>>>>>>> Regards,
>>>>>>>>> Parvez
>>>>>>>>>
>>>>>>>>> Martin Taal wrote:
>>>>>>>>>> Hi Parvez,
>>>>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping
>>>>>>>>>> from the ecore to the java classes. But I can't really imagine
>>>>>>>>>> that this one is 100mb large. Also the same epackage can not
>>>>>>>>>> be registered twice.
>>>>>>>>>>
>>>>>>>>>> Internally the hbDataStore keeps a cross reference map which
>>>>>>>>>> can take some space (but 100mb seems a lot). This one is not
>>>>>>>>>> cleared when doing close() on the datastore or the hbhelper.
>>>>>>>>>> Is there still a pointer somewhere to the old datastore?
>>>>>>>>>>
>>>>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the
>>>>>>>>>> underlying sessionfactory so I am surprised that your
>>>>>>>>>> sessionfactoru.close() works.
>>>>>>>>>>
>>>>>>>>>> So if you create 5 hbdatastores and initialize them then 500Mb
>>>>>>>>>> is used?
>>>>>>>>>>
>>>>>>>>>> gr. Martin
>>>>>>>>>>
>>>>>>>>>> PC wrote:
>>>>>>>>>>> Hi,
>>>>>>>>>>>
>>>>>>>>>>> Every time user creates a project in our application we
>>>>>>>>>>> initialize a new database (embedded HSQLDB) and hence we have
>>>>>>>>>>> to initialize HbDataStore.
>>>>>>>>>>> I have number of emf models and nearly 100mb is consumed on
>>>>>>>>>>> each hbds.initialize();
>>>>>>>>>>> Before user can create another project, existing opened(if
>>>>>>>>>>> any) project/database is closed and session is cleared.
>>>>>>>>>>>
>>>>>>>>>>> These are the steps done on close of project:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>>>>> session.clear();
>>>>>>>>>>> //here shutdown statement is issued for the db and
>>>>>>>>>>> then
>>>>>>>>>>> session.disconnect();
>>>>>>>>>>> session.close();
>>>>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>>>>>> _dbName is session factory name
>>>>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>>>>> sessionFactory.close(); //session factory obtained
>>>>>>>>>>> from teneo
>>>>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>>>>> runtime.gc();
>>>>>>>>>>>
>>>>>>>>>>> But it seems that emf objects created during models
>>>>>>>>>>> initialization remains in memory and so if user creates
>>>>>>>>>>> another project then again 100mb is consumed and hence
>>>>>>>>>>> shortly runs out of memory.
>>>>>>>>>>>
>>>>>>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>>>>>>
>>>>>>>>>>> Any suggestions to fix it?
>>>>>>>>>>>
>>>>>>>>>>> Thanks.
>>>>>>>>>>> Parvez
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>
>>>>>
>>>
>>>
>
>
Re: [Teneo] memory consumption keeps building up [message #79572 is a reply to message #79556] Thu, 12 April 2007 09:52 Go to previous messageGo to next message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
What I do not understand is why the referenceTo takes has such a large size. This class has two
members a boolean and a string (which is a query). Can you check one of the referenceTo's and see
why the string is so large?

gr. Martin

PC wrote:
> Hi Martin,
>
> I think thats because of HbDataStore$ReferenceTo.
>
> 2nd Time: 69 instances of
> org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
> Deep size 122 MB
>
>
> 3rd Time: 138 instances of
> org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
> Deep size 213 MB
>
> Regards,
> Parvez
>
>
> Martin Taal wrote:
>> Hi Parvez,
>> Afaiu the issue is that there is still a reference to the hbdatastore
>> somewhere. The deregister should solve the references from the statics
>> of Teneo. You can also try to set all references to the sessionfactory
>> to null before gc-ing. Can you analyse if there are other references
>> to the datastore instance?
>>
>> Yes, I have made the computeReferers method protected in cvs. Although
>> overriding the computereferers method only resolves the symptom.
>> I aim to do a next release early next week.
>>
>> gr. Martin
>>
>> PC wrote:
>>> Thanks Martin.
>>>
>>> Yes, I did add following but didn't help.
>>>
>>>
>>> Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap( ).remove(_dbName);
>>>
>>> Resource.Factory.Registry.INSTANCE.getProtocolToFactoryMap() .remove(HIBERNATE);
>>>
>>>
>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName);
>>> HbHelper.INSTANCE.deRegisterDataStore(HIBERNATE);
>>>
>>>
>>> Earlier you mentioned that
>>>
>>> "referers field is only used after initialization to support
>>> cross-reference queries. If this is not a requirement then it can be
>>> cleared"
>>>
>>> so just wondering (short term/quick solution) if computeReferers()
>>> returns null or empty hashmap (though I know it is private at the
>>> moment and can't be overridden) then that should solve the problem,
>>> is it?, any other issues if you can think of?
>>>
>>> At present, I am using 0.7.5, as you were saying fix in next release,
>>> any idea when that could be?
>>>
>>> Thanks.
>>>
>>> - Parvez
>>>
>>>
>>>
>>> Martin Taal wrote:
>>>> Hi Parvez,
>>>> I just noticed the closeAll method in the HbHelper does not clear
>>>> the HbHelper.dataStoreByPersistentClass map. This is at least one
>>>> reason that the hbdatastore is not gc-ed.
>>>> I have entered a bugzilla for this. This will be solved in the next
>>>> release.
>>>>
>>>> As a workaround you can try the HbHelper.deRegisterDataStore method.
>>>> This one should remove the references to the datastore from both
>>>> internal HbHelper maps.
>>>>
>>>> gr. Martin
>>>>
>>>> PC wrote:
>>>>> Hi Martin,
>>>>>
>>>>> I don't think that I am keeping the ref to old datastore.
>>>>> Not sure, but from deep size calculation of referers field, it
>>>>> looks that it may be keeping ref to some old objects. So in one
>>>>> instance of HbDataStore's referers field's keySet calculates to
>>>>> that much size.
>>>>>
>>>>> - Parvez
>>>>>
>>>>> Martin Taal wrote:
>>>>>> Thanks :-)
>>>>>>
>>>>>> The referers field is only used after initialization to support
>>>>>> cross-reference queries. If this is not a requirement then it can
>>>>>> be cleared. The only problem on the short term is that it is not
>>>>>> possible to clear it by subclassing hbdatastore. I will change
>>>>>> this in cvs so then the build of the referers hashmap can be
>>>>>> prevented.
>>>>>>
>>>>>> Btw, do you have an idea why there is still a reference to the
>>>>>> closed hbdatastores, there must be a reference to them otherwise
>>>>>> it would also be gc-ed.
>>>>>>
>>>>>> gr. Martin
>>>>>>
>>>>>> PC wrote:
>>>>>>> oh yes forgot to mention, that your guess was right that it is
>>>>>>> referers field ;-)
>>>>>>>
>>>>>>>
>>>>>>> PC wrote:
>>>>>>>> Hi Martin,
>>>>>>>>
>>>>>>>> I did some more investigation, and it looks that it is referers
>>>>>>>> () field of HbDataStore. By the time I created 6 projects, it
>>>>>>>> went upto 483mb.
>>>>>>>>
>>>>>>>> I am enclosing some profiler snapshots in zip file for your
>>>>>>>> consideration.
>>>>>>>>
>>>>>>>> - Parvez
>>>>>>>>
>>>>>>>> Martin Taal wrote:
>>>>>>>>> Hi Parvez,
>>>>>>>>> How large is your model? Would the cross reference mapping
>>>>>>>>> cause the memory use (it is the referers member in the
>>>>>>>>> HbDataStore)?
>>>>>>>>>
>>>>>>>>> gr. Martin
>>>>>>>>>
>>>>>>>>> PC wrote:
>>>>>>>>>> Hi Martin,
>>>>>>>>>>
>>>>>>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>>>>>> otherwise I guess I would have seen "session is already
>>>>>>>>>> closed" or something.
>>>>>>>>>>
>>>>>>>>>> As per initialise time it used to take from 15 - 20 secs. But
>>>>>>>>>> now I have changed to use cacheableFile, so that have reduced
>>>>>>>>>> to 7 - 10 seconds.
>>>>>>>>>>
>>>>>>>>>> Regards,
>>>>>>>>>> Parvez
>>>>>>>>>>
>>>>>>>>>> Martin Taal wrote:
>>>>>>>>>>> Hi Parvez,
>>>>>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping
>>>>>>>>>>> from the ecore to the java classes. But I can't really
>>>>>>>>>>> imagine that this one is 100mb large. Also the same epackage
>>>>>>>>>>> can not be registered twice.
>>>>>>>>>>>
>>>>>>>>>>> Internally the hbDataStore keeps a cross reference map which
>>>>>>>>>>> can take some space (but 100mb seems a lot). This one is not
>>>>>>>>>>> cleared when doing close() on the datastore or the hbhelper.
>>>>>>>>>>> Is there still a pointer somewhere to the old datastore?
>>>>>>>>>>>
>>>>>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the
>>>>>>>>>>> underlying sessionfactory so I am surprised that your
>>>>>>>>>>> sessionfactoru.close() works.
>>>>>>>>>>>
>>>>>>>>>>> So if you create 5 hbdatastores and initialize them then
>>>>>>>>>>> 500Mb is used?
>>>>>>>>>>>
>>>>>>>>>>> gr. Martin
>>>>>>>>>>>
>>>>>>>>>>> PC wrote:
>>>>>>>>>>>> Hi,
>>>>>>>>>>>>
>>>>>>>>>>>> Every time user creates a project in our application we
>>>>>>>>>>>> initialize a new database (embedded HSQLDB) and hence we
>>>>>>>>>>>> have to initialize HbDataStore.
>>>>>>>>>>>> I have number of emf models and nearly 100mb is consumed on
>>>>>>>>>>>> each hbds.initialize();
>>>>>>>>>>>> Before user can create another project, existing opened(if
>>>>>>>>>>>> any) project/database is closed and session is cleared.
>>>>>>>>>>>>
>>>>>>>>>>>> These are the steps done on close of project:
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>>>>>> session.clear();
>>>>>>>>>>>> //here shutdown statement is issued for the db and
>>>>>>>>>>>> then
>>>>>>>>>>>> session.disconnect();
>>>>>>>>>>>> session.close();
>>>>>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>>>>>>> _dbName is session factory name
>>>>>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>>>>>> sessionFactory.close(); //session factory
>>>>>>>>>>>> obtained from teneo
>>>>>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>>>>>> runtime.gc();
>>>>>>>>>>>>
>>>>>>>>>>>> But it seems that emf objects created during models
>>>>>>>>>>>> initialization remains in memory and so if user creates
>>>>>>>>>>>> another project then again 100mb is consumed and hence
>>>>>>>>>>>> shortly runs out of memory.
>>>>>>>>>>>>
>>>>>>>>>>>> So just wondering do I have to do something more about
>>>>>>>>>>>> clearing?
>>>>>>>>>>>>
>>>>>>>>>>>> Any suggestions to fix it?
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks.
>>>>>>>>>>>> Parvez
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>
>>>>>>
>>>>
>>>>
>>
>>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #81475 is a reply to message #79572] Mon, 30 April 2007 09:15 Go to previous messageGo to next message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
This is a multi-part message in MIME format.
--------------010706040700060306070708
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 8bit

Hi Martin,
This was showing as deep size but not the size of referenceTo itself.
However, we did investigation for couple of days now by using 2
different profilers. And finally it looks that ref to session is kept
somewhere in GUI code (eclipse
Re: [Teneo] memory consumption keeps building up [message #81537 is a reply to message #81475] Mon, 30 April 2007 11:03 Go to previous message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
After some more thought. The deep size is probably caused by the fact that the ReferenceTo is a
non-static inner-class. The referenceTo object itself only contains two string members.

The latest release gives you access to the refers member so you can clear it after initialization,
but this probably won't help as long as there is a separate reference to the hbdatastore (which you
will remove as I understand).

gr. Martin

PC wrote:
> Hi Martin,
> This was showing as deep size but not the size of referenceTo itself.
> However, we did investigation for couple of days now by using 2
> different profilers. And finally it looks that ref to session is kept
> somewhere in GUI code (eclipse – rcp, listeners, menu items etc.) and we
> had a hard time breaking path so that session could be garbage
> collected. Anyway, we intend to change out strategy so that only so that
> only once db is initialized. It won’t solve this problem but will hide it.
> Thanks for your time and feedback.
> Regards,
> Parvez
>
>
> Martin Taal wrote:
>> Hi Parvez,
>> What I do not understand is why the referenceTo takes has such a large
>> size. This class has two members a boolean and a string (which is a
>> query). Can you check one of the referenceTo's and see why the string
>> is so large?
>>
>> gr. Martin
>>
>> PC wrote:
>>> Hi Martin,
>>>
>>> I think thats because of HbDataStore$ReferenceTo.
>>>
>>> 2nd Time: 69 instances of
>>> org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
>>> Deep size 122 MB
>>>
>>>
>>> 3rd Time: 138 instances of
>>> org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
>>> Deep size 213 MB
>>>
>>> Regards,
>>> Parvez
>>>
>>>
>>> Martin Taal wrote:
>>>> Hi Parvez,
>>>> Afaiu the issue is that there is still a reference to the
>>>> hbdatastore somewhere. The deregister should solve the references
>>>> from the statics of Teneo. You can also try to set all references to
>>>> the sessionfactory to null before gc-ing. Can you analyse if there
>>>> are other references to the datastore instance?
>>>>
>>>> Yes, I have made the computeReferers method protected in cvs.
>>>> Although overriding the computereferers method only resolves the
>>>> symptom.
>>>> I aim to do a next release early next week.
>>>>
>>>> gr. Martin
>>>>
>>>> PC wrote:
>>>>> Thanks Martin.
>>>>>
>>>>> Yes, I did add following but didn't help.
>>>>>
>>>>>
>>>>> Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap( ).remove(_dbName);
>>>>>
>>>>> Resource.Factory.Registry.INSTANCE.getProtocolToFactoryMap() .remove(HIBERNATE);
>>>>>
>>>>>
>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName);
>>>>> HbHelper.INSTANCE.deRegisterDataStore(HIBERNATE);
>>>>>
>>>>>
>>>>> Earlier you mentioned that
>>>>>
>>>>> "referers field is only used after initialization to support
>>>>> cross-reference queries. If this is not a requirement then it can
>>>>> be cleared"
>>>>>
>>>>> so just wondering (short term/quick solution) if computeReferers()
>>>>> returns null or empty hashmap (though I know it is private at the
>>>>> moment and can't be overridden) then that should solve the problem,
>>>>> is it?, any other issues if you can think of?
>>>>>
>>>>> At present, I am using 0.7.5, as you were saying fix in next
>>>>> release, any idea when that could be?
>>>>>
>>>>> Thanks.
>>>>>
>>>>> - Parvez
>>>>>
>>>>>
>>>>>
>>>>> Martin Taal wrote:
>>>>>> Hi Parvez,
>>>>>> I just noticed the closeAll method in the HbHelper does not clear
>>>>>> the HbHelper.dataStoreByPersistentClass map. This is at least one
>>>>>> reason that the hbdatastore is not gc-ed.
>>>>>> I have entered a bugzilla for this. This will be solved in the
>>>>>> next release.
>>>>>>
>>>>>> As a workaround you can try the HbHelper.deRegisterDataStore
>>>>>> method. This one should remove the references to the datastore
>>>>>> from both internal HbHelper maps.
>>>>>>
>>>>>> gr. Martin
>>>>>>
>>>>>> PC wrote:
>>>>>>> Hi Martin,
>>>>>>>
>>>>>>> I don't think that I am keeping the ref to old datastore.
>>>>>>> Not sure, but from deep size calculation of referers field, it
>>>>>>> looks that it may be keeping ref to some old objects. So in one
>>>>>>> instance of HbDataStore's referers field's keySet calculates to
>>>>>>> that much size.
>>>>>>>
>>>>>>> - Parvez
>>>>>>>
>>>>>>> Martin Taal wrote:
>>>>>>>> Thanks :-)
>>>>>>>>
>>>>>>>> The referers field is only used after initialization to support
>>>>>>>> cross-reference queries. If this is not a requirement then it
>>>>>>>> can be cleared. The only problem on the short term is that it is
>>>>>>>> not possible to clear it by subclassing hbdatastore. I will
>>>>>>>> change this in cvs so then the build of the referers hashmap can
>>>>>>>> be prevented.
>>>>>>>>
>>>>>>>> Btw, do you have an idea why there is still a reference to the
>>>>>>>> closed hbdatastores, there must be a reference to them otherwise
>>>>>>>> it would also be gc-ed.
>>>>>>>>
>>>>>>>> gr. Martin
>>>>>>>>
>>>>>>>> PC wrote:
>>>>>>>>> oh yes forgot to mention, that your guess was right that it is
>>>>>>>>> referers field ;-)
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> PC wrote:
>>>>>>>>>> Hi Martin,
>>>>>>>>>>
>>>>>>>>>> I did some more investigation, and it looks that it is
>>>>>>>>>> referers () field of HbDataStore. By the time I created 6
>>>>>>>>>> projects, it went upto 483mb.
>>>>>>>>>>
>>>>>>>>>> I am enclosing some profiler snapshots in zip file for your
>>>>>>>>>> consideration.
>>>>>>>>>>
>>>>>>>>>> - Parvez
>>>>>>>>>>
>>>>>>>>>> Martin Taal wrote:
>>>>>>>>>>> Hi Parvez,
>>>>>>>>>>> How large is your model? Would the cross reference mapping
>>>>>>>>>>> cause the memory use (it is the referers member in the
>>>>>>>>>>> HbDataStore)?
>>>>>>>>>>>
>>>>>>>>>>> gr. Martin
>>>>>>>>>>>
>>>>>>>>>>> PC wrote:
>>>>>>>>>>>> Hi Martin,
>>>>>>>>>>>>
>>>>>>>>>>>> yes, if I initialize 5 times then it goes to around 500mb or
>>>>>>>>>>>> so.
>>>>>>>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>>>>>>>> otherwise I guess I would have seen "session is already
>>>>>>>>>>>> closed" or something.
>>>>>>>>>>>>
>>>>>>>>>>>> As per initialise time it used to take from 15 - 20 secs.
>>>>>>>>>>>> But now I have changed to use cacheableFile, so that have
>>>>>>>>>>>> reduced to 7 - 10 seconds.
>>>>>>>>>>>>
>>>>>>>>>>>> Regards,
>>>>>>>>>>>> Parvez
>>>>>>>>>>>>
>>>>>>>>>>>> Martin Taal wrote:
>>>>>>>>>>>>> Hi Parvez,
>>>>>>>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping
>>>>>>>>>>>>> from the ecore to the java classes. But I can't really
>>>>>>>>>>>>> imagine that this one is 100mb large. Also the same
>>>>>>>>>>>>> epackage can not be registered twice.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Internally the hbDataStore keeps a cross reference map
>>>>>>>>>>>>> which can take some space (but 100mb seems a lot). This one
>>>>>>>>>>>>> is not cleared when doing close() on the datastore or the
>>>>>>>>>>>>> hbhelper. Is there still a pointer somewhere to the old
>>>>>>>>>>>>> datastore?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the
>>>>>>>>>>>>> underlying sessionfactory so I am surprised that your
>>>>>>>>>>>>> sessionfactoru.close() works.
>>>>>>>>>>>>>
>>>>>>>>>>>>> So if you create 5 hbdatastores and initialize them then
>>>>>>>>>>>>> 500Mb is used?
>>>>>>>>>>>>>
>>>>>>>>>>>>> gr. Martin
>>>>>>>>>>>>>
>>>>>>>>>>>>> PC wrote:
>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Every time user creates a project in our application we
>>>>>>>>>>>>>> initialize a new database (embedded HSQLDB) and hence we
>>>>>>>>>>>>>> have to initialize HbDataStore.
>>>>>>>>>>>>>> I have number of emf models and nearly 100mb is consumed
>>>>>>>>>>>>>> on each hbds.initialize();
>>>>>>>>>>>>>> Before user can create another project, existing opened(if
>>>>>>>>>>>>>> any) project/database is closed and session is cleared.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> These are the steps done on close of project:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>>>>>>>> session.clear();
>>>>>>>>>>>>>> //here shutdown statement is issued for the db
>>>>>>>>>>>>>> and then
>>>>>>>>>>>>>> session.disconnect();
>>>>>>>>>>>>>> session.close();
>>>>>>>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName);
>>>>>>>>>>>>>> // _dbName is session factory name
>>>>>>>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>>>>>>>> sessionFactory.close(); //session factory
>>>>>>>>>>>>>> obtained from teneo
>>>>>>>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>>>>>>>> runtime.gc();
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> But it seems that emf objects created during models
>>>>>>>>>>>>>> initialization remains in memory and so if user creates
>>>>>>>>>>>>>> another project then again 100mb is consumed and hence
>>>>>>>>>>>>>> shortly runs out of memory.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> So just wondering do I have to do something more about
>>>>>>>>>>>>>> clearing?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Any suggestions to fix it?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks.
>>>>>>>>>>>>>> Parvez
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>
>>>>>>
>>>>
>>>>
>>
>>
>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #604347 is a reply to message #78399] Wed, 04 April 2007 16:00 Go to previous message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
There is an ERuntime.INSTANCE which keeps track of mapping from the ecore to the java classes. But I
can't really imagine that this one is 100mb large. Also the same epackage can not be registered twice.

Internally the hbDataStore keeps a cross reference map which can take some space (but 100mb seems a
lot). This one is not cleared when doing close() on the datastore or the hbhelper. Is there still a
pointer somewhere to the old datastore?

Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying sessionfactory so I am surprised
that your sessionfactoru.close() works.

So if you create 5 hbdatastores and initialize them then 500Mb is used?

gr. Martin

PC wrote:
> Hi,
>
> Every time user creates a project in our application we initialize a new
> database (embedded HSQLDB) and hence we have to initialize HbDataStore.
> I have number of emf models and nearly 100mb is consumed on each
> hbds.initialize();
> Before user can create another project, existing opened(if any)
> project/database is closed and session is cleared.
>
> These are the steps done on close of project:
>
>
> session.flush(); //session obtained from teneo
> session.clear();
> //here shutdown statement is issued for the db and then
> session.disconnect();
> session.close();
> HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName is
> session factory name
> HbHelper.INSTANCE.closeAll();
> sessionFactory.close(); //session factory obtained from teneo
> Runtime runtime = Runtime.getRuntime();
> runtime.gc();
>
> But it seems that emf objects created during models initialization
> remains in memory and so if user creates another project then again
> 100mb is consumed and hence shortly runs out of memory.
>
> So just wondering do I have to do something more about clearing?
>
> Any suggestions to fix it?
>
> Thanks.
> Parvez


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #604351 is a reply to message #78417] Wed, 04 April 2007 16:20 Go to previous message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
Hi Martin,

yes, if I initialize 5 times then it goes to around 500mb or so.
SessionFactory close seems to work as I don't see any error, otherwise I
guess I would have seen "session is already closed" or something.

As per initialise time it used to take from 15 - 20 secs. But now I have
changed to use cacheableFile, so that have reduced to 7 - 10 seconds.

Regards,
Parvez

Martin Taal wrote:
> Hi Parvez,
> There is an ERuntime.INSTANCE which keeps track of mapping from the
> ecore to the java classes. But I can't really imagine that this one is
> 100mb large. Also the same epackage can not be registered twice.
>
> Internally the hbDataStore keeps a cross reference map which can take
> some space (but 100mb seems a lot). This one is not cleared when doing
> close() on the datastore or the hbhelper. Is there still a pointer
> somewhere to the old datastore?
>
> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
> sessionfactory so I am surprised that your sessionfactoru.close() works.
>
> So if you create 5 hbdatastores and initialize them then 500Mb is used?
>
> gr. Martin
>
> PC wrote:
>> Hi,
>>
>> Every time user creates a project in our application we initialize a
>> new database (embedded HSQLDB) and hence we have to initialize
>> HbDataStore.
>> I have number of emf models and nearly 100mb is consumed on each
>> hbds.initialize();
>> Before user can create another project, existing opened(if any)
>> project/database is closed and session is cleared.
>>
>> These are the steps done on close of project:
>>
>>
>> session.flush(); //session obtained from teneo
>> session.clear();
>> //here shutdown statement is issued for the db and then
>> session.disconnect();
>> session.close();
>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName is
>> session factory name
>> HbHelper.INSTANCE.closeAll();
>> sessionFactory.close(); //session factory obtained from teneo
>> Runtime runtime = Runtime.getRuntime();
>> runtime.gc();
>>
>> But it seems that emf objects created during models initialization
>> remains in memory and so if user creates another project then again
>> 100mb is consumed and hence shortly runs out of memory.
>>
>> So just wondering do I have to do something more about clearing?
>>
>> Any suggestions to fix it?
>>
>> Thanks.
>> Parvez
>
>
Re: [Teneo] memory consumption keeps building up [message #604355 is a reply to message #78430] Wed, 04 April 2007 16:31 Go to previous message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
How large is your model? Would the cross reference mapping cause the memory use (it is the referers
member in the HbDataStore)?

gr. Martin

PC wrote:
> Hi Martin,
>
> yes, if I initialize 5 times then it goes to around 500mb or so.
> SessionFactory close seems to work as I don't see any error, otherwise I
> guess I would have seen "session is already closed" or something.
>
> As per initialise time it used to take from 15 - 20 secs. But now I have
> changed to use cacheableFile, so that have reduced to 7 - 10 seconds.
>
> Regards,
> Parvez
>
> Martin Taal wrote:
>> Hi Parvez,
>> There is an ERuntime.INSTANCE which keeps track of mapping from the
>> ecore to the java classes. But I can't really imagine that this one is
>> 100mb large. Also the same epackage can not be registered twice.
>>
>> Internally the hbDataStore keeps a cross reference map which can take
>> some space (but 100mb seems a lot). This one is not cleared when doing
>> close() on the datastore or the hbhelper. Is there still a pointer
>> somewhere to the old datastore?
>>
>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>> sessionfactory so I am surprised that your sessionfactoru.close() works.
>>
>> So if you create 5 hbdatastores and initialize them then 500Mb is used?
>>
>> gr. Martin
>>
>> PC wrote:
>>> Hi,
>>>
>>> Every time user creates a project in our application we initialize a
>>> new database (embedded HSQLDB) and hence we have to initialize
>>> HbDataStore.
>>> I have number of emf models and nearly 100mb is consumed on each
>>> hbds.initialize();
>>> Before user can create another project, existing opened(if any)
>>> project/database is closed and session is cleared.
>>>
>>> These are the steps done on close of project:
>>>
>>>
>>> session.flush(); //session obtained from teneo
>>> session.clear();
>>> //here shutdown statement is issued for the db and then
>>> session.disconnect();
>>> session.close();
>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName
>>> is session factory name
>>> HbHelper.INSTANCE.closeAll();
>>> sessionFactory.close(); //session factory obtained from teneo
>>> Runtime runtime = Runtime.getRuntime();
>>> runtime.gc();
>>>
>>> But it seems that emf objects created during models initialization
>>> remains in memory and so if user creates another project then again
>>> 100mb is consumed and hence shortly runs out of memory.
>>>
>>> So just wondering do I have to do something more about clearing?
>>>
>>> Any suggestions to fix it?
>>>
>>> Thanks.
>>> Parvez
>>
>>


--

With Regards, Martin Taal

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Re: [Teneo] memory consumption keeps building up [message #604380 is a reply to message #78445] Thu, 05 April 2007 16:38 Go to previous message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
This is a multi-part message in MIME format.
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Hi Martin,

I did some more investigation, and it looks that it is referers () field
of HbDataStore. By the time I created 6 projects, it went upto 483mb.

I am enclosing some profiler snapshots in zip file for your consideration.

- Parvez

Martin Taal wrote:
> Hi Parvez,
> How large is your model? Would the cross reference mapping cause the
> memory use (it is the referers member in the HbDataStore)?
>
> gr. Martin
>
> PC wrote:
>> Hi Martin,
>>
>> yes, if I initialize 5 times then it goes to around 500mb or so.
>> SessionFactory close seems to work as I don't see any error, otherwise
>> I guess I would have seen "session is already closed" or something.
>>
>> As per initialise time it used to take from 15 - 20 secs. But now I
>> have changed to use cacheableFile, so that have reduced to 7 - 10
>> seconds.
>>
>> Regards,
>> Parvez
>>
>> Martin Taal wrote:
>>> Hi Parvez,
>>> There is an ERuntime.INSTANCE which keeps track of mapping from the
>>> ecore to the java classes. But I can't really imagine that this one
>>> is 100mb large. Also the same epackage can not be registered twice.
>>>
>>> Internally the hbDataStore keeps a cross reference map which can take
>>> some space (but 100mb seems a lot). This one is not cleared when
>>> doing close() on the datastore or the hbhelper. Is there still a
>>> pointer somewhere to the old datastore?
>>>
>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>> sessionfactory so I am surprised that your sessionfactoru.close() works.
>>>
>>> So if you create 5 hbdatastores and initialize them then 500Mb is used?
>>>
>>> gr. Martin
>>>
>>> PC wrote:
>>>> Hi,
>>>>
>>>> Every time user creates a project in our application we initialize a
>>>> new database (embedded HSQLDB) and hence we have to initialize
>>>> HbDataStore.
>>>> I have number of emf models and nearly 100mb is consumed on each
>>>> hbds.initialize();
>>>> Before user can create another project, existing opened(if any)
>>>> project/database is closed and session is cleared.
>>>>
>>>> These are the steps done on close of project:
>>>>
>>>>
>>>> session.flush(); //session obtained from teneo
>>>> session.clear();
>>>> //here shutdown statement is issued for the db and then
>>>> session.disconnect();
>>>> session.close();
>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName
>>>> is session factory name
>>>> HbHelper.INSTANCE.closeAll();
>>>> sessionFactory.close(); //session factory obtained from
>>>> teneo
>>>> Runtime runtime = Runtime.getRuntime();
>>>> runtime.gc();
>>>>
>>>> But it seems that emf objects created during models initialization
>>>> remains in memory and so if user creates another project then again
>>>> 100mb is consumed and hence shortly runs out of memory.
>>>>
>>>> So just wondering do I have to do something more about clearing?
>>>>
>>>> Any suggestions to fix it?
>>>>
>>>> Thanks.
>>>> Parvez
>>>
>>>
>
>


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Re: [Teneo] memory consumption keeps building up [message #604385 is a reply to message #78533] Thu, 05 April 2007 16:44 Go to previous message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
oh yes forgot to mention, that your guess was right that it is referers
field ;-)


PC wrote:
> Hi Martin,
>
> I did some more investigation, and it looks that it is referers () field
> of HbDataStore. By the time I created 6 projects, it went upto 483mb.
>
> I am enclosing some profiler snapshots in zip file for your consideration.
>
> - Parvez
>
> Martin Taal wrote:
>> Hi Parvez,
>> How large is your model? Would the cross reference mapping cause the
>> memory use (it is the referers member in the HbDataStore)?
>>
>> gr. Martin
>>
>> PC wrote:
>>> Hi Martin,
>>>
>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>> SessionFactory close seems to work as I don't see any error,
>>> otherwise I guess I would have seen "session is already closed" or
>>> something.
>>>
>>> As per initialise time it used to take from 15 - 20 secs. But now I
>>> have changed to use cacheableFile, so that have reduced to 7 - 10
>>> seconds.
>>>
>>> Regards,
>>> Parvez
>>>
>>> Martin Taal wrote:
>>>> Hi Parvez,
>>>> There is an ERuntime.INSTANCE which keeps track of mapping from the
>>>> ecore to the java classes. But I can't really imagine that this one
>>>> is 100mb large. Also the same epackage can not be registered twice.
>>>>
>>>> Internally the hbDataStore keeps a cross reference map which can
>>>> take some space (but 100mb seems a lot). This one is not cleared
>>>> when doing close() on the datastore or the hbhelper. Is there still
>>>> a pointer somewhere to the old datastore?
>>>>
>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>>> sessionfactory so I am surprised that your sessionfactoru.close()
>>>> works.
>>>>
>>>> So if you create 5 hbdatastores and initialize them then 500Mb is used?
>>>>
>>>> gr. Martin
>>>>
>>>> PC wrote:
>>>>> Hi,
>>>>>
>>>>> Every time user creates a project in our application we initialize
>>>>> a new database (embedded HSQLDB) and hence we have to initialize
>>>>> HbDataStore.
>>>>> I have number of emf models and nearly 100mb is consumed on each
>>>>> hbds.initialize();
>>>>> Before user can create another project, existing opened(if any)
>>>>> project/database is closed and session is cleared.
>>>>>
>>>>> These are the steps done on close of project:
>>>>>
>>>>>
>>>>> session.flush(); //session obtained from teneo
>>>>> session.clear();
>>>>> //here shutdown statement is issued for the db and then
>>>>> session.disconnect();
>>>>> session.close();
>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); // _dbName
>>>>> is session factory name
>>>>> HbHelper.INSTANCE.closeAll();
>>>>> sessionFactory.close(); //session factory obtained from
>>>>> teneo
>>>>> Runtime runtime = Runtime.getRuntime();
>>>>> runtime.gc();
>>>>>
>>>>> But it seems that emf objects created during models initialization
>>>>> remains in memory and so if user creates another project then again
>>>>> 100mb is consumed and hence shortly runs out of memory.
>>>>>
>>>>> So just wondering do I have to do something more about clearing?
>>>>>
>>>>> Any suggestions to fix it?
>>>>>
>>>>> Thanks.
>>>>> Parvez
>>>>
>>>>
>>
>>
>
Re: [Teneo] memory consumption keeps building up [message #604389 is a reply to message #78552] Thu, 05 April 2007 17:23 Go to previous message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Thanks :-)

The referers field is only used after initialization to support cross-reference queries. If this is
not a requirement then it can be cleared. The only problem on the short term is that it is not
possible to clear it by subclassing hbdatastore. I will change this in cvs so then the build of the
referers hashmap can be prevented.

Btw, do you have an idea why there is still a reference to the closed hbdatastores, there must be a
reference to them otherwise it would also be gc-ed.

gr. Martin

PC wrote:
> oh yes forgot to mention, that your guess was right that it is referers
> field ;-)
>
>
> PC wrote:
>> Hi Martin,
>>
>> I did some more investigation, and it looks that it is referers ()
>> field of HbDataStore. By the time I created 6 projects, it went upto
>> 483mb.
>>
>> I am enclosing some profiler snapshots in zip file for your
>> consideration.
>>
>> - Parvez
>>
>> Martin Taal wrote:
>>> Hi Parvez,
>>> How large is your model? Would the cross reference mapping cause the
>>> memory use (it is the referers member in the HbDataStore)?
>>>
>>> gr. Martin
>>>
>>> PC wrote:
>>>> Hi Martin,
>>>>
>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>> SessionFactory close seems to work as I don't see any error,
>>>> otherwise I guess I would have seen "session is already closed" or
>>>> something.
>>>>
>>>> As per initialise time it used to take from 15 - 20 secs. But now I
>>>> have changed to use cacheableFile, so that have reduced to 7 - 10
>>>> seconds.
>>>>
>>>> Regards,
>>>> Parvez
>>>>
>>>> Martin Taal wrote:
>>>>> Hi Parvez,
>>>>> There is an ERuntime.INSTANCE which keeps track of mapping from the
>>>>> ecore to the java classes. But I can't really imagine that this one
>>>>> is 100mb large. Also the same epackage can not be registered twice.
>>>>>
>>>>> Internally the hbDataStore keeps a cross reference map which can
>>>>> take some space (but 100mb seems a lot). This one is not cleared
>>>>> when doing close() on the datastore or the hbhelper. Is there still
>>>>> a pointer somewhere to the old datastore?
>>>>>
>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>>>> sessionfactory so I am surprised that your sessionfactoru.close()
>>>>> works.
>>>>>
>>>>> So if you create 5 hbdatastores and initialize them then 500Mb is
>>>>> used?
>>>>>
>>>>> gr. Martin
>>>>>
>>>>> PC wrote:
>>>>>> Hi,
>>>>>>
>>>>>> Every time user creates a project in our application we initialize
>>>>>> a new database (embedded HSQLDB) and hence we have to initialize
>>>>>> HbDataStore.
>>>>>> I have number of emf models and nearly 100mb is consumed on each
>>>>>> hbds.initialize();
>>>>>> Before user can create another project, existing opened(if any)
>>>>>> project/database is closed and session is cleared.
>>>>>>
>>>>>> These are the steps done on close of project:
>>>>>>
>>>>>>
>>>>>> session.flush(); //session obtained from teneo
>>>>>> session.clear();
>>>>>> //here shutdown statement is issued for the db and then
>>>>>> session.disconnect();
>>>>>> session.close();
>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>> _dbName is session factory name
>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>> sessionFactory.close(); //session factory obtained from
>>>>>> teneo
>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>> runtime.gc();
>>>>>>
>>>>>> But it seems that emf objects created during models initialization
>>>>>> remains in memory and so if user creates another project then
>>>>>> again 100mb is consumed and hence shortly runs out of memory.
>>>>>>
>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>
>>>>>> Any suggestions to fix it?
>>>>>>
>>>>>> Thanks.
>>>>>> Parvez
>>>>>
>>>>>
>>>
>>>
>>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #604412 is a reply to message #78566] Fri, 06 April 2007 08:48 Go to previous message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
Hi Martin,

I don't think that I am keeping the ref to old datastore.
Not sure, but from deep size calculation of referers field, it looks
that it may be keeping ref to some old objects. So in one instance of
HbDataStore's referers field's keySet calculates to that much size.

- Parvez

Martin Taal wrote:
> Thanks :-)
>
> The referers field is only used after initialization to support
> cross-reference queries. If this is not a requirement then it can be
> cleared. The only problem on the short term is that it is not possible
> to clear it by subclassing hbdatastore. I will change this in cvs so
> then the build of the referers hashmap can be prevented.
>
> Btw, do you have an idea why there is still a reference to the closed
> hbdatastores, there must be a reference to them otherwise it would also
> be gc-ed.
>
> gr. Martin
>
> PC wrote:
>> oh yes forgot to mention, that your guess was right that it is
>> referers field ;-)
>>
>>
>> PC wrote:
>>> Hi Martin,
>>>
>>> I did some more investigation, and it looks that it is referers ()
>>> field of HbDataStore. By the time I created 6 projects, it went
>>> upto 483mb.
>>>
>>> I am enclosing some profiler snapshots in zip file for your
>>> consideration.
>>>
>>> - Parvez
>>>
>>> Martin Taal wrote:
>>>> Hi Parvez,
>>>> How large is your model? Would the cross reference mapping cause the
>>>> memory use (it is the referers member in the HbDataStore)?
>>>>
>>>> gr. Martin
>>>>
>>>> PC wrote:
>>>>> Hi Martin,
>>>>>
>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>> SessionFactory close seems to work as I don't see any error,
>>>>> otherwise I guess I would have seen "session is already closed" or
>>>>> something.
>>>>>
>>>>> As per initialise time it used to take from 15 - 20 secs. But now I
>>>>> have changed to use cacheableFile, so that have reduced to 7 - 10
>>>>> seconds.
>>>>>
>>>>> Regards,
>>>>> Parvez
>>>>>
>>>>> Martin Taal wrote:
>>>>>> Hi Parvez,
>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping from
>>>>>> the ecore to the java classes. But I can't really imagine that
>>>>>> this one is 100mb large. Also the same epackage can not be
>>>>>> registered twice.
>>>>>>
>>>>>> Internally the hbDataStore keeps a cross reference map which can
>>>>>> take some space (but 100mb seems a lot). This one is not cleared
>>>>>> when doing close() on the datastore or the hbhelper. Is there
>>>>>> still a pointer somewhere to the old datastore?
>>>>>>
>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>>>>> sessionfactory so I am surprised that your sessionfactoru.close()
>>>>>> works.
>>>>>>
>>>>>> So if you create 5 hbdatastores and initialize them then 500Mb is
>>>>>> used?
>>>>>>
>>>>>> gr. Martin
>>>>>>
>>>>>> PC wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> Every time user creates a project in our application we
>>>>>>> initialize a new database (embedded HSQLDB) and hence we have to
>>>>>>> initialize HbDataStore.
>>>>>>> I have number of emf models and nearly 100mb is consumed on each
>>>>>>> hbds.initialize();
>>>>>>> Before user can create another project, existing opened(if any)
>>>>>>> project/database is closed and session is cleared.
>>>>>>>
>>>>>>> These are the steps done on close of project:
>>>>>>>
>>>>>>>
>>>>>>> session.flush(); //session obtained from teneo
>>>>>>> session.clear();
>>>>>>> //here shutdown statement is issued for the db and then
>>>>>>> session.disconnect();
>>>>>>> session.close();
>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>> _dbName is session factory name
>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>> sessionFactory.close(); //session factory obtained
>>>>>>> from teneo
>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>> runtime.gc();
>>>>>>>
>>>>>>> But it seems that emf objects created during models
>>>>>>> initialization remains in memory and so if user creates another
>>>>>>> project then again 100mb is consumed and hence shortly runs out
>>>>>>> of memory.
>>>>>>>
>>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>>
>>>>>>> Any suggestions to fix it?
>>>>>>>
>>>>>>> Thanks.
>>>>>>> Parvez
>>>>>>
>>>>>>
>>>>
>>>>
>>>
>
>
Re: [Teneo] memory consumption keeps building up [message #604452 is a reply to message #78640] Fri, 06 April 2007 21:41 Go to previous message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
I just noticed the closeAll method in the HbHelper does not clear the
HbHelper.dataStoreByPersistentClass map. This is at least one reason that the hbdatastore is not gc-ed.
I have entered a bugzilla for this. This will be solved in the next release.

As a workaround you can try the HbHelper.deRegisterDataStore method. This one should remove the
references to the datastore from both internal HbHelper maps.

gr. Martin

PC wrote:
> Hi Martin,
>
> I don't think that I am keeping the ref to old datastore.
> Not sure, but from deep size calculation of referers field, it looks
> that it may be keeping ref to some old objects. So in one instance of
> HbDataStore's referers field's keySet calculates to that much size.
>
> - Parvez
>
> Martin Taal wrote:
>> Thanks :-)
>>
>> The referers field is only used after initialization to support
>> cross-reference queries. If this is not a requirement then it can be
>> cleared. The only problem on the short term is that it is not possible
>> to clear it by subclassing hbdatastore. I will change this in cvs so
>> then the build of the referers hashmap can be prevented.
>>
>> Btw, do you have an idea why there is still a reference to the closed
>> hbdatastores, there must be a reference to them otherwise it would
>> also be gc-ed.
>>
>> gr. Martin
>>
>> PC wrote:
>>> oh yes forgot to mention, that your guess was right that it is
>>> referers field ;-)
>>>
>>>
>>> PC wrote:
>>>> Hi Martin,
>>>>
>>>> I did some more investigation, and it looks that it is referers ()
>>>> field of HbDataStore. By the time I created 6 projects, it went
>>>> upto 483mb.
>>>>
>>>> I am enclosing some profiler snapshots in zip file for your
>>>> consideration.
>>>>
>>>> - Parvez
>>>>
>>>> Martin Taal wrote:
>>>>> Hi Parvez,
>>>>> How large is your model? Would the cross reference mapping cause
>>>>> the memory use (it is the referers member in the HbDataStore)?
>>>>>
>>>>> gr. Martin
>>>>>
>>>>> PC wrote:
>>>>>> Hi Martin,
>>>>>>
>>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>> otherwise I guess I would have seen "session is already closed" or
>>>>>> something.
>>>>>>
>>>>>> As per initialise time it used to take from 15 - 20 secs. But now
>>>>>> I have changed to use cacheableFile, so that have reduced to 7 -
>>>>>> 10 seconds.
>>>>>>
>>>>>> Regards,
>>>>>> Parvez
>>>>>>
>>>>>> Martin Taal wrote:
>>>>>>> Hi Parvez,
>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping from
>>>>>>> the ecore to the java classes. But I can't really imagine that
>>>>>>> this one is 100mb large. Also the same epackage can not be
>>>>>>> registered twice.
>>>>>>>
>>>>>>> Internally the hbDataStore keeps a cross reference map which can
>>>>>>> take some space (but 100mb seems a lot). This one is not cleared
>>>>>>> when doing close() on the datastore or the hbhelper. Is there
>>>>>>> still a pointer somewhere to the old datastore?
>>>>>>>
>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>>>>>> sessionfactory so I am surprised that your sessionfactoru.close()
>>>>>>> works.
>>>>>>>
>>>>>>> So if you create 5 hbdatastores and initialize them then 500Mb is
>>>>>>> used?
>>>>>>>
>>>>>>> gr. Martin
>>>>>>>
>>>>>>> PC wrote:
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> Every time user creates a project in our application we
>>>>>>>> initialize a new database (embedded HSQLDB) and hence we have to
>>>>>>>> initialize HbDataStore.
>>>>>>>> I have number of emf models and nearly 100mb is consumed on each
>>>>>>>> hbds.initialize();
>>>>>>>> Before user can create another project, existing opened(if any)
>>>>>>>> project/database is closed and session is cleared.
>>>>>>>>
>>>>>>>> These are the steps done on close of project:
>>>>>>>>
>>>>>>>>
>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>> session.clear();
>>>>>>>> //here shutdown statement is issued for the db and then
>>>>>>>> session.disconnect();
>>>>>>>> session.close();
>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>>> _dbName is session factory name
>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>> sessionFactory.close(); //session factory obtained
>>>>>>>> from teneo
>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>> runtime.gc();
>>>>>>>>
>>>>>>>> But it seems that emf objects created during models
>>>>>>>> initialization remains in memory and so if user creates another
>>>>>>>> project then again 100mb is consumed and hence shortly runs out
>>>>>>>> of memory.
>>>>>>>>
>>>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>>>
>>>>>>>> Any suggestions to fix it?
>>>>>>>>
>>>>>>>> Thanks.
>>>>>>>> Parvez
>>>>>>>
>>>>>>>
>>>>>
>>>>>
>>>>
>>
>>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #604516 is a reply to message #78792] Tue, 10 April 2007 08:49 Go to previous message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
Thanks Martin.

Yes, I did add following but didn't help.


Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap( ).remove(_dbName);

Resource.Factory.Registry.INSTANCE.getProtocolToFactoryMap() .remove(HIBERNATE);


HbHelper.INSTANCE.deRegisterDataStore(_dbName);
HbHelper.INSTANCE.deRegisterDataStore(HIBERNATE);


Earlier you mentioned that

"referers field is only used after initialization to support
cross-reference queries. If this is not a requirement then it can be
cleared"

so just wondering (short term/quick solution) if computeReferers()
returns null or empty hashmap (though I know it is private at the moment
and can't be overridden) then that should solve the problem, is it?, any
other issues if you can think of?

At present, I am using 0.7.5, as you were saying fix in next release,
any idea when that could be?

Thanks.

- Parvez



Martin Taal wrote:
> Hi Parvez,
> I just noticed the closeAll method in the HbHelper does not clear the
> HbHelper.dataStoreByPersistentClass map. This is at least one reason
> that the hbdatastore is not gc-ed.
> I have entered a bugzilla for this. This will be solved in the next
> release.
>
> As a workaround you can try the HbHelper.deRegisterDataStore method.
> This one should remove the references to the datastore from both
> internal HbHelper maps.
>
> gr. Martin
>
> PC wrote:
>> Hi Martin,
>>
>> I don't think that I am keeping the ref to old datastore.
>> Not sure, but from deep size calculation of referers field, it looks
>> that it may be keeping ref to some old objects. So in one instance of
>> HbDataStore's referers field's keySet calculates to that much size.
>>
>> - Parvez
>>
>> Martin Taal wrote:
>>> Thanks :-)
>>>
>>> The referers field is only used after initialization to support
>>> cross-reference queries. If this is not a requirement then it can be
>>> cleared. The only problem on the short term is that it is not
>>> possible to clear it by subclassing hbdatastore. I will change this
>>> in cvs so then the build of the referers hashmap can be prevented.
>>>
>>> Btw, do you have an idea why there is still a reference to the closed
>>> hbdatastores, there must be a reference to them otherwise it would
>>> also be gc-ed.
>>>
>>> gr. Martin
>>>
>>> PC wrote:
>>>> oh yes forgot to mention, that your guess was right that it is
>>>> referers field ;-)
>>>>
>>>>
>>>> PC wrote:
>>>>> Hi Martin,
>>>>>
>>>>> I did some more investigation, and it looks that it is referers ()
>>>>> field of HbDataStore. By the time I created 6 projects, it went
>>>>> upto 483mb.
>>>>>
>>>>> I am enclosing some profiler snapshots in zip file for your
>>>>> consideration.
>>>>>
>>>>> - Parvez
>>>>>
>>>>> Martin Taal wrote:
>>>>>> Hi Parvez,
>>>>>> How large is your model? Would the cross reference mapping cause
>>>>>> the memory use (it is the referers member in the HbDataStore)?
>>>>>>
>>>>>> gr. Martin
>>>>>>
>>>>>> PC wrote:
>>>>>>> Hi Martin,
>>>>>>>
>>>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>>> otherwise I guess I would have seen "session is already closed"
>>>>>>> or something.
>>>>>>>
>>>>>>> As per initialise time it used to take from 15 - 20 secs. But now
>>>>>>> I have changed to use cacheableFile, so that have reduced to 7 -
>>>>>>> 10 seconds.
>>>>>>>
>>>>>>> Regards,
>>>>>>> Parvez
>>>>>>>
>>>>>>> Martin Taal wrote:
>>>>>>>> Hi Parvez,
>>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping from
>>>>>>>> the ecore to the java classes. But I can't really imagine that
>>>>>>>> this one is 100mb large. Also the same epackage can not be
>>>>>>>> registered twice.
>>>>>>>>
>>>>>>>> Internally the hbDataStore keeps a cross reference map which can
>>>>>>>> take some space (but 100mb seems a lot). This one is not cleared
>>>>>>>> when doing close() on the datastore or the hbhelper. Is there
>>>>>>>> still a pointer somewhere to the old datastore?
>>>>>>>>
>>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the underlying
>>>>>>>> sessionfactory so I am surprised that your
>>>>>>>> sessionfactoru.close() works.
>>>>>>>>
>>>>>>>> So if you create 5 hbdatastores and initialize them then 500Mb
>>>>>>>> is used?
>>>>>>>>
>>>>>>>> gr. Martin
>>>>>>>>
>>>>>>>> PC wrote:
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>> Every time user creates a project in our application we
>>>>>>>>> initialize a new database (embedded HSQLDB) and hence we have
>>>>>>>>> to initialize HbDataStore.
>>>>>>>>> I have number of emf models and nearly 100mb is consumed on
>>>>>>>>> each hbds.initialize();
>>>>>>>>> Before user can create another project, existing opened(if any)
>>>>>>>>> project/database is closed and session is cleared.
>>>>>>>>>
>>>>>>>>> These are the steps done on close of project:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>>> session.clear();
>>>>>>>>> //here shutdown statement is issued for the db and then
>>>>>>>>> session.disconnect();
>>>>>>>>> session.close();
>>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>>>> _dbName is session factory name
>>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>>> sessionFactory.close(); //session factory obtained
>>>>>>>>> from teneo
>>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>>> runtime.gc();
>>>>>>>>>
>>>>>>>>> But it seems that emf objects created during models
>>>>>>>>> initialization remains in memory and so if user creates another
>>>>>>>>> project then again 100mb is consumed and hence shortly runs out
>>>>>>>>> of memory.
>>>>>>>>>
>>>>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>>>>
>>>>>>>>> Any suggestions to fix it?
>>>>>>>>>
>>>>>>>>> Thanks.
>>>>>>>>> Parvez
>>>>>>>>
>>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>
>>>
>
>
Re: [Teneo] memory consumption keeps building up [message #604520 is a reply to message #78969] Tue, 10 April 2007 09:27 Go to previous message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
Afaiu the issue is that there is still a reference to the hbdatastore somewhere. The deregister
should solve the references from the statics of Teneo. You can also try to set all references to the
sessionfactory to null before gc-ing. Can you analyse if there are other references to the datastore
instance?

Yes, I have made the computeReferers method protected in cvs. Although overriding the
computereferers method only resolves the symptom.
I aim to do a next release early next week.

gr. Martin

PC wrote:
> Thanks Martin.
>
> Yes, I did add following but didn't help.
>
>
> Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap( ).remove(_dbName);
>
> Resource.Factory.Registry.INSTANCE.getProtocolToFactoryMap() .remove(HIBERNATE);
>
>
> HbHelper.INSTANCE.deRegisterDataStore(_dbName);
> HbHelper.INSTANCE.deRegisterDataStore(HIBERNATE);
>
>
> Earlier you mentioned that
>
> "referers field is only used after initialization to support
> cross-reference queries. If this is not a requirement then it can be
> cleared"
>
> so just wondering (short term/quick solution) if computeReferers()
> returns null or empty hashmap (though I know it is private at the moment
> and can't be overridden) then that should solve the problem, is it?, any
> other issues if you can think of?
>
> At present, I am using 0.7.5, as you were saying fix in next release,
> any idea when that could be?
>
> Thanks.
>
> - Parvez
>
>
>
> Martin Taal wrote:
>> Hi Parvez,
>> I just noticed the closeAll method in the HbHelper does not clear the
>> HbHelper.dataStoreByPersistentClass map. This is at least one reason
>> that the hbdatastore is not gc-ed.
>> I have entered a bugzilla for this. This will be solved in the next
>> release.
>>
>> As a workaround you can try the HbHelper.deRegisterDataStore method.
>> This one should remove the references to the datastore from both
>> internal HbHelper maps.
>>
>> gr. Martin
>>
>> PC wrote:
>>> Hi Martin,
>>>
>>> I don't think that I am keeping the ref to old datastore.
>>> Not sure, but from deep size calculation of referers field, it looks
>>> that it may be keeping ref to some old objects. So in one instance of
>>> HbDataStore's referers field's keySet calculates to that much size.
>>>
>>> - Parvez
>>>
>>> Martin Taal wrote:
>>>> Thanks :-)
>>>>
>>>> The referers field is only used after initialization to support
>>>> cross-reference queries. If this is not a requirement then it can be
>>>> cleared. The only problem on the short term is that it is not
>>>> possible to clear it by subclassing hbdatastore. I will change this
>>>> in cvs so then the build of the referers hashmap can be prevented.
>>>>
>>>> Btw, do you have an idea why there is still a reference to the
>>>> closed hbdatastores, there must be a reference to them otherwise it
>>>> would also be gc-ed.
>>>>
>>>> gr. Martin
>>>>
>>>> PC wrote:
>>>>> oh yes forgot to mention, that your guess was right that it is
>>>>> referers field ;-)
>>>>>
>>>>>
>>>>> PC wrote:
>>>>>> Hi Martin,
>>>>>>
>>>>>> I did some more investigation, and it looks that it is referers ()
>>>>>> field of HbDataStore. By the time I created 6 projects, it went
>>>>>> upto 483mb.
>>>>>>
>>>>>> I am enclosing some profiler snapshots in zip file for your
>>>>>> consideration.
>>>>>>
>>>>>> - Parvez
>>>>>>
>>>>>> Martin Taal wrote:
>>>>>>> Hi Parvez,
>>>>>>> How large is your model? Would the cross reference mapping cause
>>>>>>> the memory use (it is the referers member in the HbDataStore)?
>>>>>>>
>>>>>>> gr. Martin
>>>>>>>
>>>>>>> PC wrote:
>>>>>>>> Hi Martin,
>>>>>>>>
>>>>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>>>> otherwise I guess I would have seen "session is already closed"
>>>>>>>> or something.
>>>>>>>>
>>>>>>>> As per initialise time it used to take from 15 - 20 secs. But
>>>>>>>> now I have changed to use cacheableFile, so that have reduced to
>>>>>>>> 7 - 10 seconds.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Parvez
>>>>>>>>
>>>>>>>> Martin Taal wrote:
>>>>>>>>> Hi Parvez,
>>>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping from
>>>>>>>>> the ecore to the java classes. But I can't really imagine that
>>>>>>>>> this one is 100mb large. Also the same epackage can not be
>>>>>>>>> registered twice.
>>>>>>>>>
>>>>>>>>> Internally the hbDataStore keeps a cross reference map which
>>>>>>>>> can take some space (but 100mb seems a lot). This one is not
>>>>>>>>> cleared when doing close() on the datastore or the hbhelper. Is
>>>>>>>>> there still a pointer somewhere to the old datastore?
>>>>>>>>>
>>>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the
>>>>>>>>> underlying sessionfactory so I am surprised that your
>>>>>>>>> sessionfactoru.close() works.
>>>>>>>>>
>>>>>>>>> So if you create 5 hbdatastores and initialize them then 500Mb
>>>>>>>>> is used?
>>>>>>>>>
>>>>>>>>> gr. Martin
>>>>>>>>>
>>>>>>>>> PC wrote:
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> Every time user creates a project in our application we
>>>>>>>>>> initialize a new database (embedded HSQLDB) and hence we have
>>>>>>>>>> to initialize HbDataStore.
>>>>>>>>>> I have number of emf models and nearly 100mb is consumed on
>>>>>>>>>> each hbds.initialize();
>>>>>>>>>> Before user can create another project, existing opened(if
>>>>>>>>>> any) project/database is closed and session is cleared.
>>>>>>>>>>
>>>>>>>>>> These are the steps done on close of project:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>>>> session.clear();
>>>>>>>>>> //here shutdown statement is issued for the db and then
>>>>>>>>>> session.disconnect();
>>>>>>>>>> session.close();
>>>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>>>>> _dbName is session factory name
>>>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>>>> sessionFactory.close(); //session factory obtained
>>>>>>>>>> from teneo
>>>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>>>> runtime.gc();
>>>>>>>>>>
>>>>>>>>>> But it seems that emf objects created during models
>>>>>>>>>> initialization remains in memory and so if user creates
>>>>>>>>>> another project then again 100mb is consumed and hence shortly
>>>>>>>>>> runs out of memory.
>>>>>>>>>>
>>>>>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>>>>>
>>>>>>>>>> Any suggestions to fix it?
>>>>>>>>>>
>>>>>>>>>> Thanks.
>>>>>>>>>> Parvez
>>>>>>>>>
>>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>
>>>>
>>
>>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #604671 is a reply to message #79038] Thu, 12 April 2007 09:45 Go to previous message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
Hi Martin,

I think thats because of HbDataStore$ReferenceTo.

2nd Time: 69 instances of
org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
Deep size 122 MB


3rd Time: 138 instances of
org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
Deep size 213 MB

Regards,
Parvez


Martin Taal wrote:
> Hi Parvez,
> Afaiu the issue is that there is still a reference to the hbdatastore
> somewhere. The deregister should solve the references from the statics
> of Teneo. You can also try to set all references to the sessionfactory
> to null before gc-ing. Can you analyse if there are other references to
> the datastore instance?
>
> Yes, I have made the computeReferers method protected in cvs. Although
> overriding the computereferers method only resolves the symptom.
> I aim to do a next release early next week.
>
> gr. Martin
>
> PC wrote:
>> Thanks Martin.
>>
>> Yes, I did add following but didn't help.
>>
>>
>> Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap( ).remove(_dbName);
>>
>> Resource.Factory.Registry.INSTANCE.getProtocolToFactoryMap() .remove(HIBERNATE);
>>
>>
>> HbHelper.INSTANCE.deRegisterDataStore(_dbName);
>> HbHelper.INSTANCE.deRegisterDataStore(HIBERNATE);
>>
>>
>> Earlier you mentioned that
>>
>> "referers field is only used after initialization to support
>> cross-reference queries. If this is not a requirement then it can be
>> cleared"
>>
>> so just wondering (short term/quick solution) if computeReferers()
>> returns null or empty hashmap (though I know it is private at the
>> moment and can't be overridden) then that should solve the problem, is
>> it?, any other issues if you can think of?
>>
>> At present, I am using 0.7.5, as you were saying fix in next release,
>> any idea when that could be?
>>
>> Thanks.
>>
>> - Parvez
>>
>>
>>
>> Martin Taal wrote:
>>> Hi Parvez,
>>> I just noticed the closeAll method in the HbHelper does not clear the
>>> HbHelper.dataStoreByPersistentClass map. This is at least one reason
>>> that the hbdatastore is not gc-ed.
>>> I have entered a bugzilla for this. This will be solved in the next
>>> release.
>>>
>>> As a workaround you can try the HbHelper.deRegisterDataStore method.
>>> This one should remove the references to the datastore from both
>>> internal HbHelper maps.
>>>
>>> gr. Martin
>>>
>>> PC wrote:
>>>> Hi Martin,
>>>>
>>>> I don't think that I am keeping the ref to old datastore.
>>>> Not sure, but from deep size calculation of referers field, it looks
>>>> that it may be keeping ref to some old objects. So in one instance
>>>> of HbDataStore's referers field's keySet calculates to that much size.
>>>>
>>>> - Parvez
>>>>
>>>> Martin Taal wrote:
>>>>> Thanks :-)
>>>>>
>>>>> The referers field is only used after initialization to support
>>>>> cross-reference queries. If this is not a requirement then it can
>>>>> be cleared. The only problem on the short term is that it is not
>>>>> possible to clear it by subclassing hbdatastore. I will change this
>>>>> in cvs so then the build of the referers hashmap can be prevented.
>>>>>
>>>>> Btw, do you have an idea why there is still a reference to the
>>>>> closed hbdatastores, there must be a reference to them otherwise it
>>>>> would also be gc-ed.
>>>>>
>>>>> gr. Martin
>>>>>
>>>>> PC wrote:
>>>>>> oh yes forgot to mention, that your guess was right that it is
>>>>>> referers field ;-)
>>>>>>
>>>>>>
>>>>>> PC wrote:
>>>>>>> Hi Martin,
>>>>>>>
>>>>>>> I did some more investigation, and it looks that it is referers
>>>>>>> () field of HbDataStore. By the time I created 6 projects, it
>>>>>>> went upto 483mb.
>>>>>>>
>>>>>>> I am enclosing some profiler snapshots in zip file for your
>>>>>>> consideration.
>>>>>>>
>>>>>>> - Parvez
>>>>>>>
>>>>>>> Martin Taal wrote:
>>>>>>>> Hi Parvez,
>>>>>>>> How large is your model? Would the cross reference mapping cause
>>>>>>>> the memory use (it is the referers member in the HbDataStore)?
>>>>>>>>
>>>>>>>> gr. Martin
>>>>>>>>
>>>>>>>> PC wrote:
>>>>>>>>> Hi Martin,
>>>>>>>>>
>>>>>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>>>>> otherwise I guess I would have seen "session is already closed"
>>>>>>>>> or something.
>>>>>>>>>
>>>>>>>>> As per initialise time it used to take from 15 - 20 secs. But
>>>>>>>>> now I have changed to use cacheableFile, so that have reduced
>>>>>>>>> to 7 - 10 seconds.
>>>>>>>>>
>>>>>>>>> Regards,
>>>>>>>>> Parvez
>>>>>>>>>
>>>>>>>>> Martin Taal wrote:
>>>>>>>>>> Hi Parvez,
>>>>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping
>>>>>>>>>> from the ecore to the java classes. But I can't really imagine
>>>>>>>>>> that this one is 100mb large. Also the same epackage can not
>>>>>>>>>> be registered twice.
>>>>>>>>>>
>>>>>>>>>> Internally the hbDataStore keeps a cross reference map which
>>>>>>>>>> can take some space (but 100mb seems a lot). This one is not
>>>>>>>>>> cleared when doing close() on the datastore or the hbhelper.
>>>>>>>>>> Is there still a pointer somewhere to the old datastore?
>>>>>>>>>>
>>>>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the
>>>>>>>>>> underlying sessionfactory so I am surprised that your
>>>>>>>>>> sessionfactoru.close() works.
>>>>>>>>>>
>>>>>>>>>> So if you create 5 hbdatastores and initialize them then 500Mb
>>>>>>>>>> is used?
>>>>>>>>>>
>>>>>>>>>> gr. Martin
>>>>>>>>>>
>>>>>>>>>> PC wrote:
>>>>>>>>>>> Hi,
>>>>>>>>>>>
>>>>>>>>>>> Every time user creates a project in our application we
>>>>>>>>>>> initialize a new database (embedded HSQLDB) and hence we have
>>>>>>>>>>> to initialize HbDataStore.
>>>>>>>>>>> I have number of emf models and nearly 100mb is consumed on
>>>>>>>>>>> each hbds.initialize();
>>>>>>>>>>> Before user can create another project, existing opened(if
>>>>>>>>>>> any) project/database is closed and session is cleared.
>>>>>>>>>>>
>>>>>>>>>>> These are the steps done on close of project:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>>>>> session.clear();
>>>>>>>>>>> //here shutdown statement is issued for the db and
>>>>>>>>>>> then
>>>>>>>>>>> session.disconnect();
>>>>>>>>>>> session.close();
>>>>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>>>>>> _dbName is session factory name
>>>>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>>>>> sessionFactory.close(); //session factory obtained
>>>>>>>>>>> from teneo
>>>>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>>>>> runtime.gc();
>>>>>>>>>>>
>>>>>>>>>>> But it seems that emf objects created during models
>>>>>>>>>>> initialization remains in memory and so if user creates
>>>>>>>>>>> another project then again 100mb is consumed and hence
>>>>>>>>>>> shortly runs out of memory.
>>>>>>>>>>>
>>>>>>>>>>> So just wondering do I have to do something more about clearing?
>>>>>>>>>>>
>>>>>>>>>>> Any suggestions to fix it?
>>>>>>>>>>>
>>>>>>>>>>> Thanks.
>>>>>>>>>>> Parvez
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>
>>>>>
>>>
>>>
>
>
Re: [Teneo] memory consumption keeps building up [message #604676 is a reply to message #79556] Thu, 12 April 2007 09:52 Go to previous message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
What I do not understand is why the referenceTo takes has such a large size. This class has two
members a boolean and a string (which is a query). Can you check one of the referenceTo's and see
why the string is so large?

gr. Martin

PC wrote:
> Hi Martin,
>
> I think thats because of HbDataStore$ReferenceTo.
>
> 2nd Time: 69 instances of
> org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
> Deep size 122 MB
>
>
> 3rd Time: 138 instances of
> org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
> Deep size 213 MB
>
> Regards,
> Parvez
>
>
> Martin Taal wrote:
>> Hi Parvez,
>> Afaiu the issue is that there is still a reference to the hbdatastore
>> somewhere. The deregister should solve the references from the statics
>> of Teneo. You can also try to set all references to the sessionfactory
>> to null before gc-ing. Can you analyse if there are other references
>> to the datastore instance?
>>
>> Yes, I have made the computeReferers method protected in cvs. Although
>> overriding the computereferers method only resolves the symptom.
>> I aim to do a next release early next week.
>>
>> gr. Martin
>>
>> PC wrote:
>>> Thanks Martin.
>>>
>>> Yes, I did add following but didn't help.
>>>
>>>
>>> Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap( ).remove(_dbName);
>>>
>>> Resource.Factory.Registry.INSTANCE.getProtocolToFactoryMap() .remove(HIBERNATE);
>>>
>>>
>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName);
>>> HbHelper.INSTANCE.deRegisterDataStore(HIBERNATE);
>>>
>>>
>>> Earlier you mentioned that
>>>
>>> "referers field is only used after initialization to support
>>> cross-reference queries. If this is not a requirement then it can be
>>> cleared"
>>>
>>> so just wondering (short term/quick solution) if computeReferers()
>>> returns null or empty hashmap (though I know it is private at the
>>> moment and can't be overridden) then that should solve the problem,
>>> is it?, any other issues if you can think of?
>>>
>>> At present, I am using 0.7.5, as you were saying fix in next release,
>>> any idea when that could be?
>>>
>>> Thanks.
>>>
>>> - Parvez
>>>
>>>
>>>
>>> Martin Taal wrote:
>>>> Hi Parvez,
>>>> I just noticed the closeAll method in the HbHelper does not clear
>>>> the HbHelper.dataStoreByPersistentClass map. This is at least one
>>>> reason that the hbdatastore is not gc-ed.
>>>> I have entered a bugzilla for this. This will be solved in the next
>>>> release.
>>>>
>>>> As a workaround you can try the HbHelper.deRegisterDataStore method.
>>>> This one should remove the references to the datastore from both
>>>> internal HbHelper maps.
>>>>
>>>> gr. Martin
>>>>
>>>> PC wrote:
>>>>> Hi Martin,
>>>>>
>>>>> I don't think that I am keeping the ref to old datastore.
>>>>> Not sure, but from deep size calculation of referers field, it
>>>>> looks that it may be keeping ref to some old objects. So in one
>>>>> instance of HbDataStore's referers field's keySet calculates to
>>>>> that much size.
>>>>>
>>>>> - Parvez
>>>>>
>>>>> Martin Taal wrote:
>>>>>> Thanks :-)
>>>>>>
>>>>>> The referers field is only used after initialization to support
>>>>>> cross-reference queries. If this is not a requirement then it can
>>>>>> be cleared. The only problem on the short term is that it is not
>>>>>> possible to clear it by subclassing hbdatastore. I will change
>>>>>> this in cvs so then the build of the referers hashmap can be
>>>>>> prevented.
>>>>>>
>>>>>> Btw, do you have an idea why there is still a reference to the
>>>>>> closed hbdatastores, there must be a reference to them otherwise
>>>>>> it would also be gc-ed.
>>>>>>
>>>>>> gr. Martin
>>>>>>
>>>>>> PC wrote:
>>>>>>> oh yes forgot to mention, that your guess was right that it is
>>>>>>> referers field ;-)
>>>>>>>
>>>>>>>
>>>>>>> PC wrote:
>>>>>>>> Hi Martin,
>>>>>>>>
>>>>>>>> I did some more investigation, and it looks that it is referers
>>>>>>>> () field of HbDataStore. By the time I created 6 projects, it
>>>>>>>> went upto 483mb.
>>>>>>>>
>>>>>>>> I am enclosing some profiler snapshots in zip file for your
>>>>>>>> consideration.
>>>>>>>>
>>>>>>>> - Parvez
>>>>>>>>
>>>>>>>> Martin Taal wrote:
>>>>>>>>> Hi Parvez,
>>>>>>>>> How large is your model? Would the cross reference mapping
>>>>>>>>> cause the memory use (it is the referers member in the
>>>>>>>>> HbDataStore)?
>>>>>>>>>
>>>>>>>>> gr. Martin
>>>>>>>>>
>>>>>>>>> PC wrote:
>>>>>>>>>> Hi Martin,
>>>>>>>>>>
>>>>>>>>>> yes, if I initialize 5 times then it goes to around 500mb or so.
>>>>>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>>>>>> otherwise I guess I would have seen "session is already
>>>>>>>>>> closed" or something.
>>>>>>>>>>
>>>>>>>>>> As per initialise time it used to take from 15 - 20 secs. But
>>>>>>>>>> now I have changed to use cacheableFile, so that have reduced
>>>>>>>>>> to 7 - 10 seconds.
>>>>>>>>>>
>>>>>>>>>> Regards,
>>>>>>>>>> Parvez
>>>>>>>>>>
>>>>>>>>>> Martin Taal wrote:
>>>>>>>>>>> Hi Parvez,
>>>>>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping
>>>>>>>>>>> from the ecore to the java classes. But I can't really
>>>>>>>>>>> imagine that this one is 100mb large. Also the same epackage
>>>>>>>>>>> can not be registered twice.
>>>>>>>>>>>
>>>>>>>>>>> Internally the hbDataStore keeps a cross reference map which
>>>>>>>>>>> can take some space (but 100mb seems a lot). This one is not
>>>>>>>>>>> cleared when doing close() on the datastore or the hbhelper.
>>>>>>>>>>> Is there still a pointer somewhere to the old datastore?
>>>>>>>>>>>
>>>>>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the
>>>>>>>>>>> underlying sessionfactory so I am surprised that your
>>>>>>>>>>> sessionfactoru.close() works.
>>>>>>>>>>>
>>>>>>>>>>> So if you create 5 hbdatastores and initialize them then
>>>>>>>>>>> 500Mb is used?
>>>>>>>>>>>
>>>>>>>>>>> gr. Martin
>>>>>>>>>>>
>>>>>>>>>>> PC wrote:
>>>>>>>>>>>> Hi,
>>>>>>>>>>>>
>>>>>>>>>>>> Every time user creates a project in our application we
>>>>>>>>>>>> initialize a new database (embedded HSQLDB) and hence we
>>>>>>>>>>>> have to initialize HbDataStore.
>>>>>>>>>>>> I have number of emf models and nearly 100mb is consumed on
>>>>>>>>>>>> each hbds.initialize();
>>>>>>>>>>>> Before user can create another project, existing opened(if
>>>>>>>>>>>> any) project/database is closed and session is cleared.
>>>>>>>>>>>>
>>>>>>>>>>>> These are the steps done on close of project:
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>>>>>> session.clear();
>>>>>>>>>>>> //here shutdown statement is issued for the db and
>>>>>>>>>>>> then
>>>>>>>>>>>> session.disconnect();
>>>>>>>>>>>> session.close();
>>>>>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName); //
>>>>>>>>>>>> _dbName is session factory name
>>>>>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>>>>>> sessionFactory.close(); //session factory
>>>>>>>>>>>> obtained from teneo
>>>>>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>>>>>> runtime.gc();
>>>>>>>>>>>>
>>>>>>>>>>>> But it seems that emf objects created during models
>>>>>>>>>>>> initialization remains in memory and so if user creates
>>>>>>>>>>>> another project then again 100mb is consumed and hence
>>>>>>>>>>>> shortly runs out of memory.
>>>>>>>>>>>>
>>>>>>>>>>>> So just wondering do I have to do something more about
>>>>>>>>>>>> clearing?
>>>>>>>>>>>>
>>>>>>>>>>>> Any suggestions to fix it?
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks.
>>>>>>>>>>>> Parvez
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>
>>>>>>
>>>>
>>>>
>>
>>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
Re: [Teneo] memory consumption keeps building up [message #605137 is a reply to message #79572] Mon, 30 April 2007 09:15 Go to previous message
Parvez is currently offline ParvezFriend
Messages: 181
Registered: July 2009
Senior Member
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Hi Martin,
This was showing as deep size but not the size of referenceTo itself.
However, we did investigation for couple of days now by using 2
different profilers. And finally it looks that ref to session is kept
somewhere in GUI code (eclipse
Re: [Teneo] memory consumption keeps building up [message #605153 is a reply to message #81475] Mon, 30 April 2007 11:03 Go to previous message
Martin Taal is currently offline Martin TaalFriend
Messages: 5468
Registered: July 2009
Senior Member
Hi Parvez,
After some more thought. The deep size is probably caused by the fact that the ReferenceTo is a
non-static inner-class. The referenceTo object itself only contains two string members.

The latest release gives you access to the refers member so you can clear it after initialization,
but this probably won't help as long as there is a separate reference to the hbdatastore (which you
will remove as I understand).

gr. Martin

PC wrote:
> Hi Martin,
> This was showing as deep size but not the size of referenceTo itself.
> However, we did investigation for couple of days now by using 2
> different profilers. And finally it looks that ref to session is kept
> somewhere in GUI code (eclipse – rcp, listeners, menu items etc.) and we
> had a hard time breaking path so that session could be garbage
> collected. Anyway, we intend to change out strategy so that only so that
> only once db is initialized. It won’t solve this problem but will hide it.
> Thanks for your time and feedback.
> Regards,
> Parvez
>
>
> Martin Taal wrote:
>> Hi Parvez,
>> What I do not understand is why the referenceTo takes has such a large
>> size. This class has two members a boolean and a string (which is a
>> query). Can you check one of the referenceTo's and see why the string
>> is so large?
>>
>> gr. Martin
>>
>> PC wrote:
>>> Hi Martin,
>>>
>>> I think thats because of HbDataStore$ReferenceTo.
>>>
>>> 2nd Time: 69 instances of
>>> org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
>>> Deep size 122 MB
>>>
>>>
>>> 3rd Time: 138 instances of
>>> org.eclipse.emf.teneo.hibernate.HbDataStore$ReferenceTo
>>> Deep size 213 MB
>>>
>>> Regards,
>>> Parvez
>>>
>>>
>>> Martin Taal wrote:
>>>> Hi Parvez,
>>>> Afaiu the issue is that there is still a reference to the
>>>> hbdatastore somewhere. The deregister should solve the references
>>>> from the statics of Teneo. You can also try to set all references to
>>>> the sessionfactory to null before gc-ing. Can you analyse if there
>>>> are other references to the datastore instance?
>>>>
>>>> Yes, I have made the computeReferers method protected in cvs.
>>>> Although overriding the computereferers method only resolves the
>>>> symptom.
>>>> I aim to do a next release early next week.
>>>>
>>>> gr. Martin
>>>>
>>>> PC wrote:
>>>>> Thanks Martin.
>>>>>
>>>>> Yes, I did add following but didn't help.
>>>>>
>>>>>
>>>>> Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap( ).remove(_dbName);
>>>>>
>>>>> Resource.Factory.Registry.INSTANCE.getProtocolToFactoryMap() .remove(HIBERNATE);
>>>>>
>>>>>
>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName);
>>>>> HbHelper.INSTANCE.deRegisterDataStore(HIBERNATE);
>>>>>
>>>>>
>>>>> Earlier you mentioned that
>>>>>
>>>>> "referers field is only used after initialization to support
>>>>> cross-reference queries. If this is not a requirement then it can
>>>>> be cleared"
>>>>>
>>>>> so just wondering (short term/quick solution) if computeReferers()
>>>>> returns null or empty hashmap (though I know it is private at the
>>>>> moment and can't be overridden) then that should solve the problem,
>>>>> is it?, any other issues if you can think of?
>>>>>
>>>>> At present, I am using 0.7.5, as you were saying fix in next
>>>>> release, any idea when that could be?
>>>>>
>>>>> Thanks.
>>>>>
>>>>> - Parvez
>>>>>
>>>>>
>>>>>
>>>>> Martin Taal wrote:
>>>>>> Hi Parvez,
>>>>>> I just noticed the closeAll method in the HbHelper does not clear
>>>>>> the HbHelper.dataStoreByPersistentClass map. This is at least one
>>>>>> reason that the hbdatastore is not gc-ed.
>>>>>> I have entered a bugzilla for this. This will be solved in the
>>>>>> next release.
>>>>>>
>>>>>> As a workaround you can try the HbHelper.deRegisterDataStore
>>>>>> method. This one should remove the references to the datastore
>>>>>> from both internal HbHelper maps.
>>>>>>
>>>>>> gr. Martin
>>>>>>
>>>>>> PC wrote:
>>>>>>> Hi Martin,
>>>>>>>
>>>>>>> I don't think that I am keeping the ref to old datastore.
>>>>>>> Not sure, but from deep size calculation of referers field, it
>>>>>>> looks that it may be keeping ref to some old objects. So in one
>>>>>>> instance of HbDataStore's referers field's keySet calculates to
>>>>>>> that much size.
>>>>>>>
>>>>>>> - Parvez
>>>>>>>
>>>>>>> Martin Taal wrote:
>>>>>>>> Thanks :-)
>>>>>>>>
>>>>>>>> The referers field is only used after initialization to support
>>>>>>>> cross-reference queries. If this is not a requirement then it
>>>>>>>> can be cleared. The only problem on the short term is that it is
>>>>>>>> not possible to clear it by subclassing hbdatastore. I will
>>>>>>>> change this in cvs so then the build of the referers hashmap can
>>>>>>>> be prevented.
>>>>>>>>
>>>>>>>> Btw, do you have an idea why there is still a reference to the
>>>>>>>> closed hbdatastores, there must be a reference to them otherwise
>>>>>>>> it would also be gc-ed.
>>>>>>>>
>>>>>>>> gr. Martin
>>>>>>>>
>>>>>>>> PC wrote:
>>>>>>>>> oh yes forgot to mention, that your guess was right that it is
>>>>>>>>> referers field ;-)
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> PC wrote:
>>>>>>>>>> Hi Martin,
>>>>>>>>>>
>>>>>>>>>> I did some more investigation, and it looks that it is
>>>>>>>>>> referers () field of HbDataStore. By the time I created 6
>>>>>>>>>> projects, it went upto 483mb.
>>>>>>>>>>
>>>>>>>>>> I am enclosing some profiler snapshots in zip file for your
>>>>>>>>>> consideration.
>>>>>>>>>>
>>>>>>>>>> - Parvez
>>>>>>>>>>
>>>>>>>>>> Martin Taal wrote:
>>>>>>>>>>> Hi Parvez,
>>>>>>>>>>> How large is your model? Would the cross reference mapping
>>>>>>>>>>> cause the memory use (it is the referers member in the
>>>>>>>>>>> HbDataStore)?
>>>>>>>>>>>
>>>>>>>>>>> gr. Martin
>>>>>>>>>>>
>>>>>>>>>>> PC wrote:
>>>>>>>>>>>> Hi Martin,
>>>>>>>>>>>>
>>>>>>>>>>>> yes, if I initialize 5 times then it goes to around 500mb or
>>>>>>>>>>>> so.
>>>>>>>>>>>> SessionFactory close seems to work as I don't see any error,
>>>>>>>>>>>> otherwise I guess I would have seen "session is already
>>>>>>>>>>>> closed" or something.
>>>>>>>>>>>>
>>>>>>>>>>>> As per initialise time it used to take from 15 - 20 secs.
>>>>>>>>>>>> But now I have changed to use cacheableFile, so that have
>>>>>>>>>>>> reduced to 7 - 10 seconds.
>>>>>>>>>>>>
>>>>>>>>>>>> Regards,
>>>>>>>>>>>> Parvez
>>>>>>>>>>>>
>>>>>>>>>>>> Martin Taal wrote:
>>>>>>>>>>>>> Hi Parvez,
>>>>>>>>>>>>> There is an ERuntime.INSTANCE which keeps track of mapping
>>>>>>>>>>>>> from the ecore to the java classes. But I can't really
>>>>>>>>>>>>> imagine that this one is 100mb large. Also the same
>>>>>>>>>>>>> epackage can not be registered twice.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Internally the hbDataStore keeps a cross reference map
>>>>>>>>>>>>> which can take some space (but 100mb seems a lot). This one
>>>>>>>>>>>>> is not cleared when doing close() on the datastore or the
>>>>>>>>>>>>> hbhelper. Is there still a pointer somewhere to the old
>>>>>>>>>>>>> datastore?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Btw, the HbHelper.INSTANCE.closeAll() also closes the
>>>>>>>>>>>>> underlying sessionfactory so I am surprised that your
>>>>>>>>>>>>> sessionfactoru.close() works.
>>>>>>>>>>>>>
>>>>>>>>>>>>> So if you create 5 hbdatastores and initialize them then
>>>>>>>>>>>>> 500Mb is used?
>>>>>>>>>>>>>
>>>>>>>>>>>>> gr. Martin
>>>>>>>>>>>>>
>>>>>>>>>>>>> PC wrote:
>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Every time user creates a project in our application we
>>>>>>>>>>>>>> initialize a new database (embedded HSQLDB) and hence we
>>>>>>>>>>>>>> have to initialize HbDataStore.
>>>>>>>>>>>>>> I have number of emf models and nearly 100mb is consumed
>>>>>>>>>>>>>> on each hbds.initialize();
>>>>>>>>>>>>>> Before user can create another project, existing opened(if
>>>>>>>>>>>>>> any) project/database is closed and session is cleared.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> These are the steps done on close of project:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> session.flush(); //session obtained from teneo
>>>>>>>>>>>>>> session.clear();
>>>>>>>>>>>>>> //here shutdown statement is issued for the db
>>>>>>>>>>>>>> and then
>>>>>>>>>>>>>> session.disconnect();
>>>>>>>>>>>>>> session.close();
>>>>>>>>>>>>>> HbHelper.INSTANCE.deRegisterDataStore(_dbName);
>>>>>>>>>>>>>> // _dbName is session factory name
>>>>>>>>>>>>>> HbHelper.INSTANCE.closeAll();
>>>>>>>>>>>>>> sessionFactory.close(); //session factory
>>>>>>>>>>>>>> obtained from teneo
>>>>>>>>>>>>>> Runtime runtime = Runtime.getRuntime();
>>>>>>>>>>>>>> runtime.gc();
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> But it seems that emf objects created during models
>>>>>>>>>>>>>> initialization remains in memory and so if user creates
>>>>>>>>>>>>>> another project then again 100mb is consumed and hence
>>>>>>>>>>>>>> shortly runs out of memory.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> So just wondering do I have to do something more about
>>>>>>>>>>>>>> clearing?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Any suggestions to fix it?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks.
>>>>>>>>>>>>>> Parvez
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>
>>>>>>
>>>>
>>>>
>>
>>
>


--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org
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