On 11/06/2012 20:15, Christopher Schultz wrote: > Jorge, > > On 6/11/12 3:01 PM, Jorge Medina wrote: >> There is not much running in the machine other than Tomcat. The JVM >> actually starts fine, using about 8GB (6GB of heap, + code + >> threads etc) but it keeps growing. In about 2 days it runs out of >> memory. (The JVM process has reached more than 15GB). > > I would be very interested in seeing where all that memory is going. > It sounds like it's not going to the heap, otherwise you'd be getting > OOME and crashing in a different way. > > Any luck using lsof?
... or VisualVM with the Memory Pools plugin? > Also, your previously-posted configuration seems a little insane: > >> Xms6g -Xmx6g -XX:NewSize=4G -XX:MaxNewSize=4G -XX:SurvivorRatio=6 >> -XX:MaxPermSize=512M -XX:-UseConcMarkSweepGC -XX:+UseStringCache >> -XX:+HeapDumpOnOutOfMemoryError >> -XX:HeapDumpPath=/home/example/logs > > -Xmx6g and NewSize=4G? Plus 0.5G for PermGen? I think you'll run into trouble setting the NewSize that large. There's a reason that the NewRatio works the way it does. Sun advice always used to be "keep the eden size between 1/4th and 1/3rd the maximum heap size". You are specifying 2/3rd the max heap. p > Have you tried using -XX:+UseCompressedOops? I wonder if you are > getting killed with half-empty 64-bit pointers. > > -chris > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > -- [key:62590808]
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