[TYPO3-Performance] ab failed requests
Dan Osipov
dosipov at phillyburbs.com
Tue Dec 23 03:13:52 CET 2008
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
Time taken for tests: 149.713674 seconds
Complete requests: 5000
Failed requests: 4951
(Connect: 0, Length: 4951, Exceptions: 0)
Write errors: 0
Non-2xx responses: 77
Total transferred: 493336288 bytes
HTML transferred: 491814214 bytes
Requests per second: 33.40 [#/sec] (mean)
Time per request: 2994.273 [ms] (mean)
Time per request: 29.943 [ms] (mean, across all concurrent requests)
Transfer rate: 3217.96 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.3 0 4
Processing: 24 2984 3531.0 2410 79895
Waiting: 24 2961 3502.4 2383 79895
Total: 24 2984 3531.0 2410 79895
Percentage of the requests served within a certain time (ms)
50% 2410
66% 2829
75% 3093
80% 3270
90% 4241
95% 7490
98% 14059
99% 19034
100% 79895 (longest request)
--
Dan Osipov
Calkins Media
http://danosipov.com/blog/
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