> So you have -Xms1g -Xmx1g yes? (I ask because you don't show this below)
No. Should I add those? On Thu, Oct 6, 2011 at 1:12 AM, Sean Corfield <[email protected]>wrote: > > On Wed, Oct 5, 2011 at 6:25 AM, John M Bliss <[email protected]> wrote: > > Based on some JVM tuning advice I Googled a while back, I have (on ACF 8) > > minimum and maximum JVM heap size set to 1024 MB. > > So you have -Xms1g -Xmx1g yes? (I ask because you don't show this below) > > > -server -XX:MaxPermSize=192m -XX:PermSize=192m -XX:+UseParallelGC > > -Dsun.rmi.dgc.client.gcInterval=600000 > > -Dsun.rmi.dgc.server.gcInterval=600000 > > -Dcoldfusion.rootDir={application.home}/../ > > -Dcoldfusion.libPath={application.home}/../lib > > Nice to see you've resisted the urge to set RMI interval to 3600000 > which is a common recommendation out there. > > You might try -XX:+UseConcMarkSweepGC instead of -XX:+UseParallelGC to > get more even throughput. > > Also worth adding -XX:+ExplicitGCInvokesConc (so System.gc() uses CMS > as well instead of the stop the world GC). > > Turn on verbose GC logging as well: > > -verbose:gc > -XX:+PrintGCTimeStamps > -XX:+PrintGCDetails > > This will allow you to see what's really going on. > > > Regularly, CF briefly consumes all but about 50 MB of max heap size. > > Yup, that's how Java works. The GC kicks in when the JVM is close to > being out of memory. > > FWIW, I've been going thru a lot of JVM tuning the last few weeks :) > > Useful tools to analyze memory usage: > * jmap to get a heap dump > * jhat to do basic analysis > * Eclipse MAT (loving this!) > -- > Sean A Corfield -- (904) 302-SEAN > An Architect's View -- http://corfield.org/ > World Singles, LLC. -- http://worldsingles.com/ > Railo Technologies, Inc. -- http://www.getrailo.com/ > > "Perfection is the enemy of the good." > -- Gustave Flaubert, French realist novelist (1821-1880) > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347970 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
