When I load many rule files in a knowledge base, I always get "PermGen space error". Does this relate to drools issue? Any one have this issue before? -- View this message in context: http://drools.46999.n3.nabble.com/PermGen-space-error-tp3728264p3728264.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Thanks for reply. I have set the value to -Xmx1024m -XX:PermSize=512m -XX:MaxPermSize=1024m, but it still gets that error. -- View this message in context: http://drools.46999.n3.nabble.com/PermGen-space-error-tp3728264p3728630.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

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 _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users