[jboss-user] [Performance Tuning] - Re: JBoss memory usage

[frankgrimes]

The maximum memory size of the VM process is not simply java heap (-Xmx) + perm generation (-XX:MaxPermSize).

e.g. There is also the native code of the VM itself which needs to reside in memory, and more. (off the top of my head I don't remember everything else that's loaded)

The following threads discuss the issue:
http://forum.java.sun.com/thread.jspa?threadID=551003&messageID=2691640
http://forums.bea.com/bea/thread.jspa?threadID=600016553&tstart=0

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