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hibernate performance issues

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ejaincom

Post subject: hibernate performance issues

Posted: Tue Mar 15, 2011 12:41 pm

Newbie

Joined: Fri Feb 25, 2011 2:34 am
Posts: 11

hi friends,
I just setp my first hibernate code on production and found that my server is crashing with error

Code:

Servlet.service() for servlet default threw exceptionjava.lang.OutOfMemoryError: PermGen space

Any idea what kind of mistakes one does , it is a small application with just a few queries.

pl. advise, i know the question is very general but i need help pl advise.

I am using struts 2.x, mysql, centos linux, hibernate 3
thanks
abhi

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pb00067

Post subject: Re: hibernate performance issues

Posted: Wed Mar 16, 2011 3:56 am

Expert

Joined: Tue Jun 16, 2009 3:36 am
Posts: 990

The default PermGen space is between 64m and 80m depending on your system architecture,
and if your application loads many classes it easily may be to small.

I suggest yoy to increase the PermGen space by specifying vmOption

-XX:MaxPermSize=128m

If 'OutOfMemoryError: PermGen space' still appears even with higher values,
then as next step I suggest to analyze the PermGen space i.e. by enabling classloader loggings.

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