Greetings! I have some extreme performance problems with Tomcat Version 3.2.1, JRE 1.3.1 on Win2000 with MIIS 4. Tomcat was provided with HP's OpenView Service Desk to provide JSPs to the web interface to the service calls. When we access certain pages that submit queries to the database the CPU and memory usage for the java.exe proceess go through the roof. CPU uage is typically above 90% and memory usage is at least 60-70MB out of 128Mb. Eventually (20 minutes later) I either get a message that the session has timed out or the page cannot be displayed.
The machine is 500Mhz and the only things on the machine is MIIS, the Service Desk application server and tomcat. (Plus all the default NT stuff). When access the Service Desk application server from the HP client on the local machine or another one, performance is great. Since the DB server is only being use for this one purpose and only from this one test application server, no one else uses it and I do not see any performance problems. Further, when the problem occurs, the hard disk rattles away like a machine gun, which is another indication that the problem is with the app server, not the database. We are accessing an Oracle DB on another Win2K server using the oracle ODBC driver. I have looked through the mailing list archives and found references that say "It's well known problem caused by memory leaks in javac," refering to Tomcart 3.2.2a. If this is a known problem, does it also apply to 3.2.1? In the tomcat.bat file, I defined the heap like this: set _RUNJAVA="%JAVA_HOME%\bin\java" -Xms8388608 -Xmx16777216 (At the time, I didn't not know you could specify it in Mb.) However, this does not see to have any effect as memory usage still goes to 70MB+. In the mailing list archive, there was a reference to increasing the stack size as well (-Xss). However, I could not find any mention of what I should set it to. Since setting the min/max memory does not seem to work the way I expect, I wasn't sure it these parameters were being recogzied at all. However, in desperation I tried -Xss1m, with no change. I have looked throught the "Tomcat IIS HowTo", but did not find anything that seem to fit the problem or should/would have an effect. I have called HP support and the basic response was "It shouldn't do that". At least they were the ones to tell me to increase the heap size. However, the problem continues. I would be extremely grateful for any and all tips, pointers, hand-holding and anything else people can provide. Best Regards, Jim Mohr ELAXY Brokerage & Trading GmbH & Co KG _________________________________ James Mohr Team Manager Hotline Am Hofbräuhaus 1 96450 Coburg Germany Fon +49 (0) 95 61.55 43.0 Fax +49 (0) 95 61.55 43.302 E-Mail: [EMAIL PROTECTED] --------------------------------------- "Be more concerned with your character than with your reputation. Your character is what you really are while your reputation is merely what others thing you are." -- John Wooden --------------------------------------- The Great Linux-NT Debate: <http://www.jimmo.com/Linux-NT_Debate/index.html> -- To unsubscribe: <mailto:[EMAIL PROTECTED]> For additional commands: <mailto:[EMAIL PROTECTED]> Troubles with the list: <mailto:[EMAIL PROTECTED]>
