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From "Caldarale, Charles R" <Chuck.Caldar...@unisys.com>
Subject RE: Max value of MaxPermSize
Date Mon, 04 Apr 2011 14:37:55 GMT
> From: Jeffrey Janner [mailto:Jeffrey.Janner@PolyDyne.com] 
> Subject: RE: Max value of MaxPermSize

> The permgen is actually a section of the heap.

Not really true.

> So if you want a 1GB permgen, you'll need at least 
> a 1GB heap size

Definitely not true.  Although PermGen is managed as a heap, it is sized independently of
the main heap; the -Xmx size emphatically does NOT include space for PermGen.  PermGen and
the main heap are allocated contiguously (in virtual space), but the sizes are unrelated.

 - Chuck


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