Which JMX statistics to watch out for in Catalina/Tomcat?

Posted by geoaxis on Server Fault See other posts from Server Fault or by geoaxis
Published on 2012-06-25T15:02:13Z Indexed on 2012/06/25 15:17 UTC
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monitoring

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tomcat

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jmx

I have configured OpenNMS to collect all kinds of numeric data coming out of tomcat7 jmx. There are a lot of things. I am interested in monitoring this tomcat instance so that I can avoid down time and lockups. What metrics should I be watching out for?

I am already monitoring things like CPU, Memory, Network via SNMP. With this JMX connection the things that I find interesting are

Catalina:type=GlobalRequestProcessor,name="ajp-bio-/a.b.c.d-XXXX"
- RequestsCount so far.
Catalina:type=Manager,context=/myApp,host=localhost
- Active sessions and its maximum so far

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