Monitoring Connections and Limits Thru HTTPD/mod_jk/Tomcat

[Jerry Malcolm]

I'm setting up an environment that has the potential for a large number 
of simultaneous requests coming in.   I have a basic Apache HTTPD with 
mod_jk talking to Tomcat, all on the same Amazon EC2 instance.  From my 
understanding, I have the potential of maxing out connections at httpd, 
at mod_jk, and also at Tomcat.  We are looking at setting up monitors to 
track all of this.  But I don't want to reinvent the wheel if there are 
others who have created solutions for this.  Is there documentation on 
guidelines for configuring connections on all three so that they work 
together smoothly?  We are setting up load-balancing on Amazon that will 
launch another EC2 instance if one EC2 get overwhelmed.  But that is 
obviously dependent upon accurately tracking and recognizing that the 
EC2 is indeed becoming overwhelmed.  Any advice on where to start with this?

Thanks.
Jerry


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