On 01/12/2008 12:41, Tom Evans wrote:
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/
We have tried siege because similar to ab configuration, but we have
problem to repeat our ab tests:
client$ siege -b -r1000 -c10 http://system_using_7.1-PRERELEASE
HTTP/1.1 200 0.05 secs: 1948 bytes ==> /cgi-bin/path_to_program
HTTP/1.1 200 0.04 secs: 1948 bytes ==> /cgi-bin/path_to_program
HTTP/1.1 200 0.05 secs: 1948 bytes ==> /cgi-bin/path_to_program
Segmentation fault: 11 (core dumped)
same problem is happening trying old url:
http://system_using_6.4-RELEASE. Have you had some advice?
We are using ab since 2004 to make a historical reference for our tests
for different hardware and systems.
Why using same hardware to run ab we can test one server running
6.4-RELEASE but fails to teste 7.1-PRERELEASE? New way to answer request
in 7.1 can crash ab at another machine? We are suspecting there is a new
limit in 7.x which not clear for us yet.
Paulo.
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