what's the best way to stress test the performance of a nginx website?

[Ilan Berkner]

Just to clarify, I'm not specifically looking for how Nginx performs, but
rather how our site performs, being that its a dynamic, php site and
relatively quiet during the summer time (i.e. a good time to test) so I'm
looking for a tool recommendation to simulate load as well as how to best
process that information.

Thank you for the advise, I'll take a look at some of the tool
recommendations.




On Sat, Jun 27, 2009 at 9:50 AM, zepolen <zepolen at gmail.com> wrote:

> On Fri, Jun 26, 2009 at 5:06 PM, Ilan Berkner<iberkner at gmail.com> wrote:
> > I haven't done stress testing in a long time... so I'm not sure what the
> > best tools are, specifically for our nginx site
>
> Rarely will nginx itself be the bottleneck. For example:
>
> ab testing serving a single image will probably show anywhere from
> 10,000 - 20,000 req/s, that is because is because after the first
> access, it will be in ram and can be served fast and efficiently from
> there on. However in a real production environment, where you might be
> serving thousands of _different_ files - when the os file cache (in
> ram) fills up, those 10,000req/s will become about 300req/s, and in a
> worst case scenario (where every request is an os cache miss), it
> becomes entirely disk seek bound (which is why SSD hard disk are great
> for this sort of job).
>
>
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