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From "Andreas Daab" <andreas.d...@tectura.com>
Subject Tomcat 5.5.12 less robust than 5.0.28?
Date Fri, 27 Jan 2006 16:06:41 GMT
Hi,

yesterday I switched our web app from Tomcat 5.0.28 with Java 1.4.2 to
Tomcat 5.5.12 with Java 1.5. We have two applications, each with 250
users. Tomcat 5.0.28 is a little slow, but has no problem to handle 500
users. With Tomcat 5.5.12/JVM 1.5 the limit is 100 - 130 users. Any
additional user gets an error. Even tomcat manager doesn't work anymore.
Both Tomcat versions share the same configuration:
 
connectionTimeout="20000"
compression="on"
maxThreads="150"
minSpareThreads="25"
maxSpareThreads="75"

JvmMx = 1536

With more maxThreads (250, 450, 500) Tomcat has the same problem.
Avarage used threads is 20.  Tomcat eats 15 - 25% cpu, it's not the
limit. We have 4 GB RAM and 4 Xeon-HAT, should be enough for 500 users.
The server runs under Windows 2003 Enterprise.
I (temporarily) switched back to 5.0.28. How to get Tomcat 5.5.12
working?

Tanks in advance

Andreas

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