Hi all, I admit that I am a Tomcat rookie. That being said, I have been struggling with out-of-memory/permgen issues for a while now with no progress. I have looked at this: http://www.xwiki.org/xwiki/bin/view/FAQ/HowToSolveAJavaHeapMemoryError ...but I have not been successful in adjusting my settings. I am running on Windows 2008 R2 64-bit with 12gb available RAM. I am trying to allocate at least 4gb to run Xwiki

, since nothing else is running on this server (other than MySQL). I run Tomcat as a service, if that matters. I have been using the Groovy function "${Runtime.getRuntime().maxMemory()}" to keep an eye on my heap size. It stays at 259522560 bytes (247.5mb) no matter what I do. I have tried setting a CATALINA_OPTS system variable with the following settings: -Xms2096m -Xmx=4096m -XX:MaxPermSize=1024m -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled I have also tried going into the Java tab on the Tomcat properties window and setting the values there: -DXms2096m -DXmx4096m -DXX:MaxPermSize=1024m -DXX:+CMSClassUnloadingEnabled -DXX:+CMSPermGenSweepingEnabled So what am I doing wrong? Or is it my understanding that is off - is that Groovy function not really telling me the allocated memory? Any advice would be greatly appreciated. Thanks! - Matt L.

Thanks, Vincent - I will change my settings to align with your recommendations. Any thoughts on how to confirm if the settings are being applied properly?

On Tue, Mar 12, 2013 at 11:33 AM, Vincent Massol <vincent(a)massol.net> wrote: > > On Mar 12, 2013, at 3:59 PM, Matt Lamoureux <mmlmrx(a)gmail.com> wrote: > >> Hi all, >> I admit that I am a Tomcat rookie. That being said, I have been >> struggling with out-of-memory/permgen issues for a while now with no >> progress. I have looked at this: >> >> http://www.xwiki.org/xwiki/bin/view/FAQ/HowToSolveAJavaHeapMemoryError >> >> ...but I have not been successful in adjusting my settings. I am running >> on Windows 2008 R2 64-bit with 12gb available RAM. I am trying to > allocate >> at least 4gb to run Xwiki > > BTW 4GB seems too much, see recommendations on > http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Installation#HPrerequis… > (I've just updated the page with more information) > > Thanks > -Vincent > >> , since nothing else is running on this server >> (other than MySQL). I run Tomcat as a service, if that matters. I have >> been using the Groovy function "${Runtime.getRuntime().maxMemory()}" to >> keep an eye on my heap size. It stays at 259522560 bytes (247.5mb) no >> matter what I do. I have tried setting a CATALINA_OPTS system variable >> with the following settings: >> >> -Xms2096m -Xmx=4096m -XX:MaxPermSize=1024m -XX:+CMSClassUnloadingEnabled >> -XX:+CMSPermGenSweepingEnabled >> >> I have also tried going into the Java tab on the Tomcat properties window >> and setting the values there: >> >> -DXms2096m >> -DXmx4096m >> -DXX:MaxPermSize=1024m >> -DXX:+CMSClassUnloadingEnabled >> -DXX:+CMSPermGenSweepingEnabled >> >> So what am I doing wrong? Or is it my understanding that is off - is > that >> Groovy function not really telling me the allocated memory? Any advice >> would be greatly appreciated. >> >> Thanks! >> - Matt L.