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Reg:DataEngine_xxxxxx_xxx [message #758464]

Wed, 23 November 2011 06:35

Eclipse User

hi,

We observed that when a report is being generated, a directory DataEngine_279358987_54 is created in /tmp location of our linux servers. We have set the below options for our reportengine:

config.getAppContext().put(DataEngine.MEMORY_USAGE, DataEngine.MEMORY_USAGE_CONSERVATIVE);
config.getAppContext().put(DataEngine.MEMORY_BUFFER_SIZE, birtProperties.getBirtMemoryBufferSize(key));

Is there document available to understand the siginificance of these parameters.

While running reports we get DataEngine directories deleted automatically after data is fetched from Database,is this anything to do with the option we set above?.

Sometimes we get the reports errored out with an exception in the file attached.

Please advise on the configuration of the reportengine to run 30 reports in parallel with each report having around 30k records.

Thanks,
KKP

Attachment: Birt_exception.txt
(Size: 3.58KB, Downloaded 305 times)

Re: Reg:DataEngine_xxxxxx_xxx [message #758537 is a reply to message #758464]

Wed, 23 November 2011 10:37

Eclipse User

This setting:
config.getAppContext().put(DataEngine.MEMORY_BUFFER_SIZE, birtProperties.getBirtMemoryBufferSize(key));
sets the max memory used per query before caching to disk. It defaults to 10 MB. What are you setting it to?

The data engine files are cached data files. The conservative memory usages setting configures settings form max memory for olap operations I believe. Do your reports use crosstabs?

What version of BIR are you using? The exception looks like a bug.

Jason

[Updated on: Wed, 23 November 2011 10:37] by Moderator

Re: Reg:DataEngine_xxxxxx_xxx [message #758639 is a reply to message #758537]

Wed, 23 November 2011 22:44

Eclipse User

Jason,

We do not have any cross tab reports.Could you please suggest what needs to be set to remove all data caching as its occupying more space and reports are erroring out with exception: No disk space left.

The exception attached in file occurs intermittently and not sure about the root cause.

Is there any implication if we delete DataEngine while the report generation is in process.

Below is the list of versions used:

BIRT version 3.7
Application Server:Weblogic10.0.2
OS:LINUX
JDK:1.5
DB:Oracle 10g

Thanks,
KKP

Re: Reg:DataEngine_xxxxxx_xxx [message #759472 is a reply to message #758639]

Mon, 28 November 2011 14:04

Eclipse User

Have you tried putting a higher value in
config.getAppContext().put(DataEngine.MEMORY_BUFFER_SIZE,
birtProperties.getBirtMemoryBufferSize(key));

I believe this will cause problems if you delete the files.

Jason

On 11/23/2011 10:44 PM, kkp wrote:
> Jason,
>
> We do not have any cross tab reports.Could you please suggest what needs
> to be set to remove all data caching as its occupying more space and
> reports are erroring out with exception: No disk space left.
> The exception attached in file occurs intermittently and not sure about
> the root cause.
>
> Is there any implication if we delete DataEngine while the report
> generation is in process.
>
> Below is the list of versions used:
>
> BIRT version 3.7
> Application Server:Weblogic10.0.2
> OS:LINUX
> JDK:1.5
> DB:Oracle 10g
>
> Thanks,
> KKP

Re: Reg:DataEngine_xxxxxx_xxx [message #760209 is a reply to message #759472]

Thu, 01 December 2011 10:45

Eclipse User

We have set it to 2MB.Even aftre removing this property, we are still facing the issue.

Re: Reg:DataEngine_xxxxxx_xxx [message #760221 is a reply to message #760209]

Thu, 01 December 2011 11:02

Eclipse User

Can you open a bugzilla entry for this?

Jason

On 12/1/2011 10:45 AM, kkp wrote:
> We have set it to 2MB.Even aftre removing this property, we are still
> facing the issue.

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