Permgen memory leaks can cause those permgen OOM. One common cause is webapps not cleaning up after themselves on context shutdown. This leaks every loaded class from the webapp into the permgen whenever the application is unloaded.
Knowing this one can workaround these leaks by being careful with application redeploys, or restarting tomcat occasionally, if you can't locate and fix the leaks in the webapp. -----Original Message----- From: celtic man [mailto:dheerajman...@hotmail.com] Sent: Friday, 4 November 2011 4:26 a.m. To: users@tomcat.apache.org Subject: Tomcat OOM errors.. I see these errors(tomcat 6) : Exception in thread "http-bio-8080-exec-21" java.lang.OutOfMemoryError: PermGen space Exception in thread "com.mchange.v2.async.ThreadPoolAsynchronousRunner $PoolThread-#0" java.lang.OutOfMemoryError: PermGen space And checked the the JAVA parameters : CATALINA_OPTS=-Xmx4000M Do i need to change that to =-Xms2048M -Xmx2048M -XX:Permsize=512m - XX:MaxPermsize=512m ?? Anticipating a favorable reply. -- View this message in context: http://old.nabble.com/Tomcat-OOM-errors..-tp32773665p32773665.html Sent from the Tomcat - User mailing list archive at Nabble.com. --------------------------------------------------------------------- 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
