> We have many servers that have been running 100-200 instances 
> of tomcat each for years without any performance problems. 
> Most of our servers are Linux 8-core machines with 32GB RAM, 
> with the tomcat instances configured with -Xms16M -Xmx192M. 
> We also have some Windows servers with 100-150 instances of 
> tomcat each, most of which are configured with -Xms16M -Xmx64M. 
> 

To add to the above, we see zero swapping and very low iowait (or disk
queue lengths in Windows).

--Eric




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