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From Jeff MAURY <jeffma...@gmail.com>
Subject RE: high CPU usage on tomcat 7
Date Thu, 04 Oct 2012 18:08:47 GMT
Le 4 oct. 2012 14:38, "Caldarale, Charles R" <Chuck.Caldarale@unisys.com> a
écrit :
>
> > From: Kirill Kireyev [mailto:kirill@instagrok.com]
> > Subject: Re: high CPU usage on tomcat 7
>
> > Perhaps what I need is to have the JVM do garbage collections more
> > frequently, so that they don't become a huge CPU-hogging ordeals
> > when they do happen.
>
> That's not how it works.  The amount of time spent in a GC operation is
dependent almost entirely on the number of live objects in the heap, not
the amount of space being reclaimed.  Having a smaller heap might improve
your cache hit rate, but it will have little effect on the time used by GC.
>
> It is highly likely that your webapps have a memory leak.  You need to
use a profiler and find out what's eating up all that memory.  If you set
the heap size to a smaller value, you should be able to provoke the
situation earlier, but it certainly won't fix it.
+1

Jeff
>
>  - Chuck
>
>
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