[TYPO3-Performance] ab failed requests

[Martin Scholl]

Hello all,


Dan Osipov wrote:
> Hello all,
> 
> I've been testing TYPO3 installation under relatively high load, and see 
> some problems with ab. There are a lot of failed requests. I have Apache 
> running with mod_fcgid under Debian. The server is fairly fast - 16Gb 
> RAM, Quad core Xeon processor, etc.
> 
> Anyone run into a similar issue? I'm pretty sure its my Apache set up, 
> but I can't pinpoint what exactly is wrong. Its operating well for a few 
> requests, but as soon as there are several concurrent users, it usually 
> fails...
> 
> Here is a typical ab output:
> 
> Server Software:        Apache/2.2.3
> Server Hostname:        localhost
> Server Port:            80
> 
> Document Path:          /
> Document Length:        99906 bytes
> 
> Concurrency Level:      100
sometimes you don't get an error message in the logfiles. This happens
when for example there is a connection timeout.
With such a high concurrency like 100, this can easily happen if you
haven't optimized your server's software configuration.

Try it again with a lower concurrency (e.g. 25) again and see what happens.


Martin


[snip]