On Thu, Jul 3, 2014 at 11:00 AM, Maxime Brugidou <[email protected]> wrote: > Hi all, > > We have been trying to get better performance from our simple haproxy > setup since we encountered issues when getting over 15k session/sec. > > Our simple test setup to reproduce the issue: > * 1 server with 2 CPUs Xeon (E5 core i7) with 6 cores each with > hyperthreading on (24 cores total) > * 1 Intel I350 Gigabit ethernet interface > * CentOS 6.5 kernel 2.6.32-431.11.2.el6.centos.plus.x86_64 > * 1 haproxy 1.5.1 recompiled (1.4 from the distribution had the same > issues anyway) > * 1 nginx on the same host with one simple worker serving a very > small static file (< 10 bytes) > * 4 client servers running siege with a simple HTTP GET / at > concurrency 500 each, in the same VLAN > > We only get session rate of ~16k per second which seems very low. The > interesting symptom is that we get 100% CPU for the haproxy process > with very low connection rate.
Maxime: Some ideas: - what happens if you up the size of the request ? - what results do you get with haproxy 1.4 ? - have you tried gdb -p $(pidof haproxy) --batch --ex "set pagination 0" --ex "thread apply all bt" ? Sometimes a few random stacktrace samples help you stumble upon an idea of where your bottleneck is. -- Sasha Pachev Fast Running Blog. http://fastrunningblog.com Run. Blog. Improve. Repeat.
