Darren/Edmon-
Can you turn on trace facilities for GC in the jvm.cfg?
e.g.
1.3.1 1.4.1
-Xtgc2 -Dibm.dg.trc.print=st_verify
-Xtgc34 -Dibm.dg.trc.print=st_compact_verbose,st_verify
More info avilable at
http://publib.boulder.ibm.com/infocenter/wasinfo/v4r0/index.jsp?topic=/com.ibm.support.was40.doc/html/Java_SDK/swg21162875.html
Martin--
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----- Original Message -----
From: "Edmon Begoli" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Wednesday, July 12, 2006 10:43 AM
Subject: Re: PS Old Gen filling up...
> 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 <[EMAIL PROTECTED]> 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
>>
>>
>>
>>
>>
>>
>>
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>>
>>
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>>
>>
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>>
>>
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>>
>> Why not visit our website http://www.connaught.plc.uk
>>
>>
>>
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>
>
> --
> Thank you,
> Edmon Begoli
> http://blogs.ittoolbox.com/eai/software
>
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