Re: [rules-users] PermGen space error
On 02/09/2012 09:34 AM, Geoffrey De Smet wrote:
The perm gen space is a subset of the heap space.
So it doesn't make sense to put them on the same value.
Try this instead:
-Xmx1024m -XX:MaxPermSize=512m
Or, if that fails:
-Xmx2048m -XX:MaxPermSize=1024m
Sorry to disagree Geoffrey, but PermGen is NOT a part of heap in all
(Sun) JVM's that I'm aware of. See
http://stackoverflow.com/questions/2129044/java-heap-terminology-young-ol...
http://www.oracle.com/technetwork/java/gc-tuning-5-138395.html (the
picture a few pages down)
So the sizes are specified separately. But having a MaxPerm of 1G and
STILL see PermGen OOM is strange.
The problem could be, that when using the CMS (concurrent mark sweep)
GC, PermGen is not collected. I have seen cases where sooner or later
OOM PermGen errors happened consistently, until we added
|-XX:+CMSPermGenSweepingEnabled|
--
CU, Joe
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