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From "Jeffrey Janner" <Jeffrey.Jan...@PolyDyne.com>
Subject RE: java.lang.OutOfMemoryError: PermGen space
Date Wed, 16 Sep 2009 14:56:14 GMT
Here's another Sun doc that specifically states that PermGen is an area
of the Heap.
http://java.sun.com/j2se/reference/whitepapers/memorymanagement_whitepap
er.pdf
Scroll down to page 17.
But for my own assurance, I'll crank up JConsole on one of my known
configurations and check for myself.
Jeff

-----Original Message-----
From: Caldarale, Charles R [mailto:Chuck.Caldarale@unisys.com] 
Sent: Wednesday, September 16, 2009 9:51 AM
To: Tomcat Users List
Subject: RE: java.lang.OutOfMemoryError: PermGen space

> From: Jeffrey Janner [mailto:Jeffrey.Janner@PolyDyne.com]
> Subject: RE: java.lang.OutOfMemoryError: PermGen space
> 
> I couldn't tell from the post if the Architecture line meant hardware,
> OS, or JVM.

A little experimentation will show that the value is dependent on the
mode of the JVM, despite the fact that the corresponding system property
name is "os.arch".

> And I'm under the impression from multiple re-reads of the
> Java tuning docs that ALL generations are drawn from the heap,
> including PermGen.

Nope.

 - Chuck


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