Performance problems with multi-processor machine

A

Anton Berg

Hi,

we are using a software written in Java (as Servlets using Tomcat
4.1.29) 1.4, which has a very poor performance. Sadly we don't have the
source-codes for the application, but from the log-files we can figure
out, that there is a very strong overhead, when changing the processors;
that means i.e. when changing from processor 1 to processor 2 a
statement which usually only needs 50ms, takes around 20 secs to finish.
That could not be....

Do you have any suggestion, maybe about the parameters which are used to
start java?

We use the following startup-properties:
-d64 -server -Xms1G -Xmx2G -Xmn800m -XX:+DisableExplicitGC
-XX:+UseParallelGC -verbose:GC -Djava.awt.headless=true

Thanks for your help,
Anton
 

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