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From Shengche Hsiao <shengchehs...@gmail.com>
Subject Re: Memory leaks best practices
Date Thu, 06 Feb 2014 14:12:51 GMT
I had the same issue, my problem was doesn't close the database connection!


On Thu, Feb 6, 2014 at 8:54 PM, Maxim Solodovnik <solomax666@gmail.com>wrote:

> Thanks a lot for quick answers have already added "-Xms512M -Xmx2G -Xss1M
> -XX:PermSize=192m -XX:MaxPermSize=512m -XX:+CMSClassUnloadingEnabled"
>
> Now will add *Model.detach(); to the code and will check the stability
> (currently application works ~2days before PermGen)
>
> Redeployment is performed using Tomcat 7.0.50 restart.
>
> Any other ideas are appreciated
>
>
> On Thu, Feb 6, 2014 at 7:28 PM, Martin Grigorov <mgrigorov@apache.org
> >wrote:
>
> > Hi,
> >
> > OOM in PermGen is not what you ask for.
> > If you leak "normal" memory than the error would be with "heap space".
> > PermGen memory is used to keep the Class instances and interned Strings.
> > If you deploy your app for first time then most probably you just need to
> > set the proper initial and max value :
> > -XX:PermSize and -XX:MaxPermSize.
> > Use JConsole to see what size you need.
> >
> > If this error happens on redeploy then most probably you have a
> ClassLoader
> > memory leak, i.e. you keep references to Class instances and they cannot
> be
> > released so the PermGen is overloaded. Those are very tricky to be
> > debugged.
> >
> >
> > Martin Grigorov
> > Wicket Training and Consulting
> >
> >
> > On Thu, Feb 6, 2014 at 1:07 PM, Maxim Solodovnik <solomax666@gmail.com
> > >wrote:
> >
> > > Hello All,
> > >
> > > Recently we have deployed our project to wicket project to production
> > > server.
> > > And start getting OutOfMemory PermGenSpace.
> > >
> > > I believe we have memory leak in our application
> > > maybe there is best practices how to deal with Models and JPA entities
> to
> > > resolve this?
> > >
> > > Thanks in advance
> > >
> > > --
> > > WBR
> > > Maxim aka solomax
> > >
> >
>
>
>
> --
> WBR
> Maxim aka solomax
>



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