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From David Moon <dmoon1...@gmail.com>
Subject [users@httpd] Failed requests in ab output
Date Sat, 25 Jun 2016 21:40:20 GMT
I've written a server and am running some ab tests from 20 EC2 instances.
Above a certain level of concurrency (about 30 for each of 20 instances, so
600 "clients" in total), I start getting failed requests.  Presumably this
is a limitation of my server's performance.  The strange thing is that
the failed
requests are always, without fail, equally distributed over Receive,
Length, and Exceptions (and 0 failed requests for Connect).  For example,
the output of my most recent test contained the following lines:

Failed requests:        576
   (Connect: 0, Receive: 192, Length: 192, Exceptions: 192)

Should I expect to see such output on server-performance-related failed
requests?  If so, why?  All of my searches on this issue only bring up
failures due to Length, on account of dynamic webpages returning content of
unexpected length.

Thanks,
David

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