Thanks John, I'll check those out. We're pretty much running the standard install of Tomcat that came with the midtier installation. Until the 7.5 P6 upgrade, we had always run with the bundled ServletExec (up through v7.0.1) so we were used to those settings. Since we're pretty green on Tomcat, we're looking for the most stable configuration since ServletExec was fairly picky regarding Java version, heap size, etc.
I'll assume mod_jk was installed automatically when Tomcat was installed with IIS... Since the person who built these left, I'm playing catch-up and I'll need to see what's installed. Appreciate the info--I need to get a lot smarter on Tomcat. Craig Carter Information Technology Manager, RSP -----Original Message----- From: Action Request System discussion list(ARSList) [mailto:[email protected]] On Behalf Of John Baker Sent: Tuesday, November 30, 2010 7:46 AM To: [email protected] Subject: Q: Current Stable Tomcat/Java Versions/Settings Hello, I wrote a post on this topic earlier this year: http://www.javasystemsolutions.com/arslist/view/89025846 In a nutshell, start by setting the initial heap size to 90% of the maximum, so -Xms1400 -Xmx1536 in yuor case. Your current setup is encouraging the garbage collector to invoke a huge clean up of 1Gb, which will exhibit itself in the VM appearing to lock up. If you're using Apache and mod_jk, be sure to run mod_jk 1.2.31. There's a critical bug (https://issues.apache.org/bugzilla/show_bug.cgi?id=48169) in mod_jk which causes delays when dealing with AJP sockets that are not properly closed - we helped them resolve it so I can confirm it did exist. This may not be the problem, but it's worth considering. Finally, review your Midtier caching to see why it's consuming all this memory. I can't imagine ServletExec being much better than Tomcat - did you upgrade when you moved to Tomcat? John -- Single Sign On for AR System http://www.javasystemsolutions.com/jss/ssoplugin _______________________________________________________________________________ UNSUBSCRIBE or access ARSlist Archives at www.arslist.org attend wwrug11 www.wwrug.com ARSList: "Where the Answers Are" _______________________________________________________________________________ UNSUBSCRIBE or access ARSlist Archives at www.arslist.org attend wwrug11 www.wwrug.com ARSList: "Where the Answers Are"
