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From "Jeffrey Janner" <Jeffrey.Jan...@PolyDyne.com>
Subject RE: java.lang.OutOfMemoryError: PermGen space
Date Wed, 16 Sep 2009 14:58:52 GMT
See my other posts, I did re-read the tuning guide and it specifically
states PermGen is part of Heap.

-----Original Message-----
From: Jeffrey Janner [mailto:Jeffrey.Janner@PolyDyne.com] 
Sent: Wednesday, September 16, 2009 9:34 AM
To: Tomcat Users List
Subject: RE: java.lang.OutOfMemoryError: PermGen space

Charles -
Of course, a quick review of the doc I provided, proved me wrong on the
Heap/PermGen issue.
I admit not having re-read the memory tuning guide in a while (maybe
since 1.4 days).
Jeff

-----Original Message-----
From: Jeffrey Janner [mailto:Jeffrey.Janner@PolyDyne.com] 
Sent: Wednesday, September 16, 2009 9:31 AM
To: Tomcat Users List
Subject: RE: java.lang.OutOfMemoryError: PermGen space

Chuck -
I couldn't tell from the post if the Architecture line meant hardware,
OS, or JVM.  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.
Yes, using Jconsole or better is what he needs to do.

Bruce-
Here is another good read.  Direct from Sun:
http://java.sun.com/javase/6/webnotes/trouble/TSG-VM/html/tools.html
Jeff


-----Original Message-----
From: Caldarale, Charles R [mailto:Chuck.Caldarale@unisys.com] 
Sent: Wednesday, September 16, 2009 9:04 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
> 
> You don't say if the JVM is 32-bit or 64-bit

Actually, he did:

> Architecture:   amd64
> JVM Version:    1.6.0_16-b01
> JVM Vendor:     Sun Microsystems Inc.

The architecture would be x86 for a 32-bit JVM on Intel/AMD.

> 1) By splitting the Heap in half between NewGen and PermGen

This is not correct.  The -Xmx size does not include the PermGen size.

Again, use JConsole or equivalent to verify that the requested heap
sizes are being used.

 - Chuck


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