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Recommended JBoss and Tomcat memory settings?

Alexander Yap

Joined: Dec 10, 2003
Posts: 2
Hi all,
Can someone recommend appropriate JVM memory settings ( -Xms and -Xmx ) to start Tomcat and JBoss for best performance?
Is there some guidelines for choosing these values based on available RAM?
I have a single machine running:
- Sun JDK 1.4.2
- MySQL Max 4.0.11
- JBoss 3.2.2 (just serving EJBs)
- Tomcat 4.1.x (running 5 Web apps, 3 of which connect to EJBs on JBoss)
- 1 Swing application (GUI controller for a chat server)
Note: The Tomcat and JBoss are separate installations, not the JBoss bundled with Tomcat.
Machine specs:
CPU: Pentium 4 2.2 GHz
OS: Mandrake Linux 9.1 + KDE 3.1

Alexander Yap
Melbourne, Australia
Michael Ernest
High Plains Drifter

Joined: Oct 25, 2000
Posts: 7292

Those who wish to answer, please find this thread in the JBoss forum and post to that one. I'll close this duplicate to keep responses in one place.

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