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From Jeffrey Janner <Jeffrey.Jan...@PolyDyne.com>
Subject RE: Max value of MaxPermSize
Date Mon, 04 Apr 2011 14:43:42 GMT
Yea, Chuck, I had qualms about the statement, but had found the exact words in a doc.
I sent a retraction while this came in.  Sorry about continuing the confusion.
Do you have any idea why he's having issues?  My bet is he's out of allocatable user-space
in his OS vm.

> -----Original Message-----
> From: Caldarale, Charles R [mailto:Chuck.Caldarale@unisys.com]
> Sent: Monday, April 04, 2011 9:38 AM
> To: Tomcat Users List
> Subject: RE: Max value of MaxPermSize
> 
> > 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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