[TYPO3-Performance] ab failed requests
Dan Osipov
dosipov at phillyburbs.com
Tue Dec 23 15:13:14 CET 2008
Tried, didn't help:
Server Software: Apache/2.2.3
Server Hostname: localhost
Server Port: 80
Document Path: /
Document Length: 106505 bytes
Concurrency Level: 10
Time taken for tests: 29.289296 seconds
Complete requests: 1000
Failed requests: 992
(Connect: 0, Length: 992, Exceptions: 0)
Write errors: 0
Total transferred: 106785315 bytes
HTML transferred: 106511315 bytes
Requests per second: 34.14 [#/sec] (mean)
Time per request: 292.893 [ms] (mean)
Time per request: 29.289 [ms] (mean, across all concurrent requests)
Transfer rate: 3560.41 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.0 0 0
Processing: 115 291 148.4 282 3298
Waiting: 115 287 148.4 277 3298
Total: 115 291 148.4 282 3298
Percentage of the requests served within a certain time (ms)
50% 282
66% 302
75% 315
80% 325
90% 346
95% 364
98% 387
99% 406
100% 3298 (longest request)
Dan Osipov
Calkins Media
http://danosipov.com/blog/
Martin Scholl wrote:
> 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]
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