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From Adam Lipscombe <>
Subject Monitoring production tomcat
Date Thu, 03 Feb 2011 09:57:59 GMT


We have a several production servers, each of which runs 1 instance of
tomcat. Within each instance of tomcat there are approximately 10
virtual websites. Each virtual website runs a copy of our web app.
Therefore each server hosts @ 10 instances of our web app

On a couple of the servers we are having problems with tomcat running
out of memory and sometimes dropping the JDBC link to the MYSQL database 
We usually restart tomcat, which of course cures the issues. However 
doing do affects every virtual site and therefore is not ideal from our 
customer's perspective.

We have been looking at this problem for some time, however it is very 
difficult to determine what is causing these problems. Very likely 
something in out webapp.

What would help is some kind of management or monitoring facility
that allows us to see which virtual site is getting into trouble.
Ideally it should give enough information to help us track down what is
causing the issue. Memory usage per site, thread view etc.

Can anyone recommend anything that can do this? Commercial or free?

Many thanks - Adam

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