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From "Robinson, Eric" <eric.robin...@psmnv.com>
Subject RE: Monitor session count & request time.
Date Sat, 12 Feb 2011 00:07:33 GMT
> -----Original Message-----
> From: Stijn Vanhoorelbeke [mailto:stijn.vanhoorelbeke@gmail.com] 
> 
> Hi,
> 
> I'm using Solr on my Tomcat 6 system. How can I measure how 
> much sessions there are active?
> 
> I could find such info through Tomcat manager 
> (manager/html/sessions?path=/solr). But that shows up ALL the 
> sessions of the past 10 min. I only want to measure active sessions.

Maybe I'm just too old school, but what's wrong with...

# netstat -antp|grep java|grep ESTAB|wc -l


> 
> Also, is there a way to measure the respons time, needed to 
> satisfy a request? This must be no log file ( too much 
> overhead to log all requests ), but just lets say retrieve 1 
> request/respons time per minute.
> 

I use the %D parameter in the pattern string of the AccessLogValve
section of server.xml. It puts the response time in every entry in the
jasper logs. Then I run a script to parse the logs and give me a nice
little breakdown of response times.

See: http://tomcat.apache.org/tomcat-6.0-doc/config/valve.html

--Eric











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