Hi all again,
We have tried it crossing these 1.5.0_18, 6u7, 6u12, 6u13 JDKs with GFv3
builds b43, b31. We experienced 100% CPU problem again.
-Burak
On Mon, Apr 6, 2009 at 1:11 PM, Burak Oguz <burak.oguz_at_gmail.com> wrote:
> Hi all,
>
> We are suffering with that CPU usage peeks in GFv3 b43 promoted. We
> discovered that it has nothing to do with the applications loaded to GFv3.
> It is a very strange behaviour because when garbage collector starts to run,
> CPU usage never drops from 100% in Linux. We have profiled it via
> Netbeans6.5 profiler. Our gc related jvm settings is below:
>
> <jvm-options>-server</jvm-options>
> <jvm-options>-XX:NewRatio=2</jvm-options>
> <jvm-options>-XX:PermSize=32m</jvm-options>
> <jvm-options>-XX:MaxPermSize=256m</jvm-options>
> <jvm-options>-XX:+UseConcMarkSweepGC</jvm-options>
> <jvm-options>-XX:+CMSPermGenSweepingEnabled</jvm-options>
> <jvm-options>-XX:+CMSClassUnloadingEnabled</jvm-options>
> <jvm-options>-Dsun.rmi.dgc.server.gcInterval=3600000</jvm-options>
> <jvm-options>-Dsun.rmi.dgc.client.gcInterval=3600000</jvm-options>
> <jvm-options>-Dcom.sun.
> enterprise.server.ss.ASQuickStartup=false</jvm-options>
> <jvm-options>-Xms40m</jvm-options>
> <jvm-options>-Xmx512m</jvm-options>
>
> In order to avoid PermGenSpace exception we have changed our GC to ConcMark
> and after that it starts to give this non-understandable CPU usage issue.
> Also we observed that it starts this strange behaviour when memory usage is
> higher than Xmx which means GC starts to work. We tried too many
> configurations but could not solve that problem.
>
> Any help or idea will be greatly appreciated.
>
> - Burak
>
>
>
> On Mon, Apr 6, 2009 at 12:32 AM, <glassfish_at_javadesktop.org> wrote:
>
>> Hi JF,
>>
>> Thanks for the help. Unfortunately, after 12 hours of running on JDK 7
>> b50 the server exhibited the same increase in CPU usage and context-switch
>> activity as before. Any other suggestions?
>> [Message sent by forum member 'rwillie6' (rwillie6)]
>>
>> http://forums.java.net/jive/thread.jspa?messageID=340680
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe_at_glassfish.dev.java.net
>> For additional commands, e-mail: users-help_at_glassfish.dev.java.net
>>
>>
>