Re: possible to monitor cxn accept queue in NIO?

2009-05-01 Thread dukehoops
Thanks. any suggestions for such a tool for: -vista -rhel? Filip Hanik - Dev Lists wrote: > > acceptCount controls a TCP stack parameter for a backlog. > The only way to monitor the backlog, would be to use tools for your > operating system that let you introspect the TCP information the stack

possible to monitor cxn accept queue in NIO?

2009-04-30 Thread dukehoops
we're using tomcat 6 nio with executor pool size much smaller than cxn acceptCount. At some load the queue may start filling up, of course. Is there a way to monitor accepted cxn queue size? didn't find anything in catalina mbean. thanks -nikita - Nikita Tovstoles vside.com

Re: what can Tomcat be doing that a profiler can't see?

2009-04-20 Thread dukehoops
s < 2% during said test. FWIW, we've discovered that replacing NIO with the old blocking connector improved latency by a factor of 4-5 times. Digging deeper... thanks -nikita Christopher Schultz-2 wrote: > > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > Nikita, &g

what can Tomcat be doing that a profiler can't see?

2009-04-16 Thread dukehoops
In brief: I am load-testing an app running on Tomcat 6 NIO and am observing a big discrepancy between avg request latency as reported by JMeter (660ms) and the profiler (19ms). I would like to understand where is the delta being spent. In detail I have two windows boxes on the same subnet of a 1G