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From Jess Holle <>
Subject Re: Monitoring Tomcat - Delta Values
Date Fri, 03 May 2013 17:53:47 GMT
On 5/3/2013 12:26 PM, Rainer Jung wrote:
> On 03.05.2013 19:03, Jess Holle wrote:
>> On 5/3/2013 11:58 AM, Rainer Jung wrote:
>>> Although AFAIR last time it couldn't do my favorite "quotient of
>>> deltas", but until now I haven't found a standard tool doing that.
>>> Average response time in last intervall = delta(cumulatedResponseTime)/
>>>                                             delta(RequestCount)
>>> Tomcat provides cumulatedResponseTime and RequestCount per Servlet,
>>> Webapp and globally, but unfortunately the tools lack for this one.
>> You can always add an MBean for such things -- and for cumulative CPU
>> time per request, cumulative time spent blocked and waiting per request,
>> etc, etc.
> We do have the above cumulative stuff for Tomcat as MBeans. But if you
> want the above statistics on a client controlled interval, the client
> needs to be able to do quotient of deltas. Haven't seen any standard
> client that can do that yet (they can do deltas and rates and some
> quotients, but not the needed combination). So that's something one
> might need to implement oneself.
I meant an MBean that does the deltas and quotients itself, of course, 
e.g. logging the results periodically.

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