Troubleshooting Grails/Groovy memory leaks?

Question

I\'ve got a Grails application that does a fairly decent amount of domain object creation and destruction, and it seems to run out of PermGen space at a very, very rapid rat

Answer 1

Have you tried

-XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled

?

Together with increasing the usual suspects (-Xmx, -Xms, -XX:PermSize and -XX:MaxPermSize) this resolved all the PermGen issues on our production Tomcat, which had occured pretty soon after deploying the app. Never seen another OOM-Exception after that. :-)