On Mon, 2008-12-01 at 10:53 -0300, Paulo Fragoso wrote:
> Hi,
>
> We was using one machine with FreeBSD 6.4-RELEASE running
> apache-worker-2.2.3 + mysql, this server can answer high request from
> one client using ab:
>
>
> {client}$ ab -n 2000 -c 1000 http://system_using_6.4-RELEASE
> ...
> Benchmarking ***** (be patient)
> Completed 200 requests
> Completed 400 requests
> Completed 600 requests
> Completed 800 requests
> Completed 1000 requests
> Completed 1200 requests
> Completed 1400 requests
> Completed 1600 requests
> Completed 1800 requests
> Finished 2000 requests
> ...
> {client}$
>
>
> Using other hardware whit FreeBSD 7.1-PRERELEASE running
> apache-worker-2.2.9_5 + mysql, we have a poor result:
>
>
> {client}$ ab -n 2000 -c 1000 http://system_using_7.1-PRERELEASE
> ...
> Test aborted after 10 failures
>
> apr_connect(): Invalid argument (22)
> {client}$
>
>
> Looking for a problem on new server log we found:
>
> kernel: TCP: [client]:50197 to [server]:80 tcpflags 0x4<RST>;
> syncache_chkrst: Spurious RST without matching syncache entry (possibly
> syncookie only), segment ignored
> kernel: TCP: [client]:53845 to [server]:80 tcpflags 0x4<RST>;
> syncache_chkrst: Spurious RST without matching syncache entry (possibly
> syncookie only), segment ignored
> kernel: TCP: [client]:53845 to [server]:80 tcpflags 0x4<RST>;
> syncache_chkrst: Spurious RST without matching syncache entry (possibly
> syncookie only), segment ignored
>
> All sysctl and apache conf are same on both server, is there a tcp
> problem with FreeBSD 7.x?
>
> Paulo Fragoso.
>
Just to rule it out, have you tried testing using a more robust tool
than ab? ab is generally disliked by the apache devs I've met. Does it
still fall over using something like siege[1] or flood[2]?
Cheers
Tom
[1] http://www.joedog.org/JoeDog/Siege
[2] http://httpd.apache.org/test/flood/
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