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Date: Wed, 12 Jul 2006 10:43:15 -0400
From: "Edmon Begoli" <ebegoli@gmail.com>
To: "Tomcat Users List" <users@tomcat.apache.org>
Subject: Re: PS Old Gen filling up...
In-Reply-To: <FDB24EB0C0E5D611A1F500065B8E46F103318DDA@CMailnth>
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References: <FDB24EB0C0E5D611A1F500065B8E46F103318DDA@CMailnth>

Darren,

Old Gen filling up is usually an indicator of a memory leak.

Other possibility is that object creation is very fast and that
garbage collector can not keep up.  Since you are using parallel
collector it is also a possibility that it needs some tweaking.

The Recalcitrant Engineer ( http://www.burnthacker.com ) blog has a
good post somewhere on tweaking the parallel connector.  Site seems to
be too busy now so I can't find it.

Regards,
Edmon

On 7/12/06, Darren Kukulka <Darren.Kukulka@connaught.plc.uk> wrote:
> Hi All,
>
>
>
> Got a situation here where PS Old Gen within the JVM heap is gradually
> filling up and locking to a point where GC will not release any of it and
> the application hangs.
>
>
>
> Running Tomcat 5.5.15 and SUN JDK 1.5_07.
>
>
>
> Machine is an 8GB dual Xeon processor Dell 2850.
>
>
>
> The JVM options are set as follows;
>
>
>
> -Dcatalina.home=F:\tomcat5
>
> -Dcatalina.base=F:\tomcat5
>
> -Djava.endorsed.dirs=F:\tomcat5\common\endorsed
>
> -Djava.io.tmpdir=F:\tomcat5\temp
>
> -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
>
> -Djava.util.logging.config.file=F:\tomcat5\conf\logging.properties
>
> -Duser.language=en
>
> -Duser.country=GB
>
> -Xms1330m
>
> -Xmx1330m
>
> -XX:+UseParallelGC
>
> -XX:ParallelGCThreads=2
>
> -XX:+UseParallelOldGC
>
> -XX:+UseAdaptiveSizePolicy
>
> -XX:NewSize=400m
>
> -XX:MaxNewSize=400m
>
> -XX:PermSize=128m
>
> -XX:MaxPermSize=128m
>
>
>
> Has anyone had similar behaviour or can you point me in the right direction?
>
>
>
> Thanks in advance.
>
>
>
> Darren Kukulka
>
>
>
>
>
>
>
> Connaught honoured AIM 'Decade of Excellence' Award
>
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>
> Connaught awarded Partnering Contractor of the Year 2005
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-- 
Thank you,
Edmon Begoli
http://blogs.ittoolbox.com/eai/software

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