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| Re: Birt 2.6.1 runtime engine OutOfMemory - PermGen space [message #718554 is a reply to message #718464] |
Wed, 24 August 2011 16:32   |
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Are you setting the jvm parameter -XX:MaxPermSize=256M?
Jason
On 8/24/2011 8:30 AM, mutantu2002 wrote:
> I'm testing a chart report in a simple Java application with stand-alone
> Birt runtime engine 2.6.1.
> When executing sequentially, the PermGen memory looks like a saw (class
> loading at every report executed), and in the long run no class loading
> related memory leak appears.
> But when executing several reports in parallel, the PermGen space begins
> to fill, and for a number of reports I get an OutOfMemory PermGen space
> exception.
> For instance, with 100 report runned in parallel and a MaxPermSize of
> 80M I've got this exception.
> My question is if this is a expected behavior for Birt engine or I can
> avoid this permanent class loading for each report? Maybe there are some
> class loading related settings when starting the platform that I missed.
> I can see in a profiler that very much time is spend on class loading
> when executing a report, and a lot of ClassNotFoundException
> instantiation and this for sure not looks very healthy even if the
> report is correctly rendered.
> Maybe Birt 3.7.0 with the new POJO runtime solve this
> memory/optimization problem?
> Thanks
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| Re: Birt 2.6.1 runtime engine OutOfMemory - PermGen space [message #718894 is a reply to message #718719] |
Thu, 25 August 2011 15:04 |
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I do not believe there are any other settings, but you can open a
bugzilla entry to just verify.
Jason
On 8/25/2011 3:12 AM, mutantu2002 wrote:
> Increasing the MaxPermSize will allow more reports to be executed in
> parallel, it's true, but I just want to know if this is a normal
> behaviour of Birt engine or there are paramaters to be set in order to
> change how the classes are loaded.
> I use Birt engine in a server that can execute many reports in the same
> time, and currently I get OutOfMemory for aprox. 10 reports simultanelly.
> I need to know if my resolution would be to increase MaxPermSize to a
> acceptable size or is anything else I can do.
>
> Jason Weathersby wrote on Wed, 24 August 2011 12:32
>> Are you setting the jvm parameter -XX:MaxPermSize=256M?
>>
>> Jason
>
>
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