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Posted to users@tomcat.apache.org by jo...@comcast.net on 2007/06/01 17:44:08 UTC
Re: Tomcat Hogging CPU
Tomcat 5.0
Java 1.5
Thank you.
-------------- Original message --------------
From: "Leon Rosenberg" <ro...@googlemail.com>
> tomcat and java versions would help a lot :-)
> Leon
>
> On 5/31/07, john.calderbank@comcast.net wrote:
> > We have been experiencing a problem where Tomcat causes CPU usage to go to
> 100%. This slows down our web servers. Has anyone else ever experienced such a
> problem?
> >
> > We average 150 active connections per web server. What do others average?
> >
> > How do others configure initial memory pool, maximum memory pool and thread
> stack size (relative to RAM)?
> >
> > We have 2.0 GB of RAM and 2 2.60 GHz CPUs on Windows 2003.
> >
> > Thank you very much.
>
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Re: Tomcat Hogging CPU
Posted by Leon Rosenberg <ro...@googlemail.com>.
which tomcat version exactly?
tomcat 5.0.19 - 5.0.30 had a weird bug with session synchronization,
if you have one of those versions try kill -QUIT tomcat (not sure how
to perform the same under windows, maybe with jmap).
and check the threaddump. One of your thread is consuming CPU, maybe
in an infinite (or very long) loop, find out which one this is.
Btw, does the 100% cpu goes down or do you have to restart the tomcat?
regards
Leon
On 6/1/07, john.calderbank@comcast.net <jo...@comcast.net> wrote:
> Tomcat 5.0
> Java 1.5
>
> Thank you.
> -------------- Original message --------------
> From: "Leon Rosenberg" <ro...@googlemail.com>
>
> > tomcat and java versions would help a lot :-)
> > Leon
> >
> > On 5/31/07, john.calderbank@comcast.net wrote:
> > > We have been experiencing a problem where Tomcat causes CPU usage to go to
> > 100%. This slows down our web servers. Has anyone else ever experienced such a
> > problem?
> > >
> > > We average 150 active connections per web server. What do others average?
> > >
> > > How do others configure initial memory pool, maximum memory pool and thread
> > stack size (relative to RAM)?
> > >
> > > We have 2.0 GB of RAM and 2 2.60 GHz CPUs on Windows 2003.
> > >
> > > Thank you very much.
> >
> > ---------------------------------------------------------------------
> > To start a new topic, e-mail: users@tomcat.apache.org
> > To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> > For additional commands, e-mail: users-help@tomcat.apache.org
> >
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