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From "Shapira, Yoav" <Yoav.Shap...@mpi.com>
Subject RE: unexpected timeout during benchmark
Date Thu, 09 Sep 2004 16:09:03 GMT

Hi,
Maybe all the request processing threads are busy and the accept queue
is full?  Check your Connector configuration and increase these
parameters if needed to allow your test to complete.

Yoav Shapira
Millennium Research Informatics


>-----Original Message-----
>From: Henrik Rathje [mailto:hrathje@ki.tng.de]
>Sent: Thursday, September 09, 2004 12:05 PM
>To: tomcat-user@jakarta.apache.org
>Subject: unexpected timeout during benchmark
>
>Hi,
>I want to measure the performance of a Servlet that I wrote. To have a
>number to compare with i wrote a servlet which does only a single
println
>in its doget method.
>
>When i measure the throughput of this servlet with ab using this
arguments:
>ab -n 20000 -c 10  http://localhost:8080/Messung1/TestServlet
>I receive:
>..
>Completed 14000 requests
>apr_poll: The timeout specified has expired (70007)
>Total of 15861 requests completed
>
>The jvm is defenitly not out of memory, (top says 50m of -Xmx170m are
>used) no garbage collection is performed during the test. After some
>minites of waitung the servlet answers again (no tomcat restart
neccessary)
>What causes this timeout?
>(when running with half the amout of requests, the throughput is
500/sec)
>Regards, Henrik
>
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