Hi Chuck, Thanks. I read that tutorial as you suggested. Very useful information. I think I understand the gist of it. After further reading it seems like there are some issues w.r.t. the use of Spring(and/or)Hibernate together with CGLib that particularly affect Tomcat. I found this thread: http://forum.springframework.org/printthread.php?t=21383&pp=40 which seems to try and point the finger at Tomcat. Does anybody concur with these findings or have you found ways around using Spring/Hibernate/CGLib/Tomcat so that they all get along? It's a bit late in the game for me to be making any major architectural changes and Tomcat has worked well for us in all other respects.
Thanks again, Darryl ----- Original Message ---- From: "Caldarale, Charles R" <chuck.caldar...@unisys.com> To: Tomcat Users List <users@tomcat.apache.org> Sent: Tuesday, March 10, 2009 5:52:29 PM Subject: RE: Tracking down OOM - PermGen using jmap and jhat > From: Darryl Pentz [mailto:djpe...@yahoo.com] > Subject: Re: Tracking down OOM - PermGen using jmap and jhat > > I tried using JConsole's GC button, but > clearly this didn't do the trick. Did clicking the button run a major GC (aka PS MarkSweep)? Are any classes at all being unloaded? (Look at the Classes tab in JConsole.) > -XX:MaxPermSize=128m That's actually not very big. > So the issue right now is a plan of attack to properly unload > classes in order to expose the likely culprit. The culprit is what's keeping the classes from being unloaded. Here's a short tutorial you might want to look at: http://java.sun.com/javase/6/webnotes/trouble/TSG-VM/html/memleaks.html - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. --------------------------------------------------------------------- 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
