Try setting -XX:MaxPermSize=256m it helps with our applications, it might do the trick here.
-----Original Message----- From: Miguel González Castaños [mailto:miguel_3_gonza...@yahoo.es] Sent: Saturday, 16 June 2012 8:56 PM To: Tomcat Users List Subject: Re: heap memory issues On 16/06/2012 12:49, Miguel González Castaños wrote: > Dear all, > > We have a webapp under Tomcat 5.5 and jdk 1.5 32 bits under a > virtual machine of 4 Gb and a 64 bits OS. > > Some of you have helped me suggesting me to install Javamelody and > sar to monitor the system. Setting up heap dumps I have managed to see > what was going on with the eclipse memory analyzer. > > The webapp sends emails that have been previously entered into the > database. It loads the emails into memory, so if you are sending 10k > emails, it loads 10k objects containing those emails. That makes the > app to use around 200-300 mb of the heap memory. > > The settings we have now for the JDK are: > > CATALINA_OPTS="$CATALINA_OPTS -XX:+HeapDumpOnOutOfMemoryError > -XX:HeapDumpPath=/opt/tomcat5/logs/ -Xms128m -Xmx512m -verbose:gc > -XX:+PrintGCTimeStamps -XX:+PrintGCDetails" > > Facts that I have witnessed: > > If I try to increase the Xmx to 740m or 1024m the GC starts working > very much and Tomcat shuts down. > > I have also tried downloading a 64 bits 1.7 jdk but I get the typical: > > Java HotSpot(TM) 64-Bit Server VM warning: Exception > java.lang.OutOfMemoryError occurred dispatching signal SIGTERM to > handler- the VM may need to be forcibly terminated > > It doesn't matter if i set the maxperm memory to 512m or I increase > the Xms and Xmx beyond 1024m, it breaks after 5-10 minutes without > doing anything. Also from the heap dumps I have realized that javamelody objects are consuming around 100Mb, so I have undeployed it to get at least more heap memory. Miguel --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
