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From "Caldarale, Charles R" <Chuck.Caldar...@unisys.com>
Subject RE: Very Long Full GC after Inactivity
Date Mon, 08 Oct 2007 17:22:20 GMT
> From: David Delbecq [mailto:delbd+jakarta@oma.be] 
> Subject: Re: Very Long Full GC after Inactivity
> 
> check the jvm runs in "server" mode (check there is a '-server'
> parameter given to jvm startup). Server and client mode have different
> GC mecanisms.

That's not correct; the set of GC algorithms available for server and
client are identical, but the default heap sizes are different.

For initial problem analysis, turn on -verbose:gc if you haven't
already, and use JConsole to look at the heap usage.  You may need a
profiler to find out just what objects are hanging around and causing
the long pause.

You might want to try running with a later JVM - a 1.5 or 6 version
should give you reduced pause times as well as better performance
overall.

 - Chuck


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