Planned Sitework Tuesday 13th Jan 2009, Starting performance tuning testing Options

[Imhotep]

Greetings.

Starting at 07:00 EST (12:00 GMT) on Tuesday, 13th Jan I'll be doing some tweaking on the server configuration to optimize speeds and page loads. I don't anticipate going more than 2 hours on it. During that period you might notice short intermittant "page cannot be displayed" or "internal server error" pages on the forums. The www site should only be minimally affected. Outages should be no longer than a minute or so as I load the new configuration and test whether it works or not. If it does then I run the benchmarking program against it and if it doesn't make things faster than revert the change. During benchmarking you should not notice any anomolies.

I

[Imhotep]

Hmm, OK, did some nondestructive tweaking and maybe I don't need to do any more.

Right after the switch:
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking forums.mosaicmusings.net (be patient).....done


Server Software: Apache/2.2.10
Server Hostname: forums.mosaicmusings.net
Server Port: 80

Document Path: /index.php
Document Length: 123620 bytes

Concurrency Level: 10
Time taken for tests: 2.252 seconds
Complete requests: 10
Failed requests: 0
Write errors: 0
Total transferred: 1240070 bytes
HTML transferred: 1236200 bytes
Requests per second: 4.44 [#/sec] (mean)
Time per request: 2251.860 [ms] (mean)
Time per request: 225.186 [ms] (mean, across all concurrent requests)
Transfer rate: 537.78 [Kbytes/sec] received

Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 2 0.9 2 3
Processing: 2200 2225 23.2 2243 2249
Waiting: 202 223 20.9 240 246
Total: 2203 2226 23.8 2245 2252

Percentage of the requests served within a certain time (ms)
50% 2245
66% 2248
75% 2249
80% 2251
90% 2252
95% 2252
98% 2252
99% 2252
100% 2252 (longest request)
[pclark@c3po ~]$

And now after the latest tweaks:

[root@c3po ~]# ab -n 1000 -c 10 http://forums.mosaicmusings.net/index.php
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking forums.mosaicmusings.net (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software: Apache/2.2.10
Server Hostname: forums.mosaicmusings.net
Server Port: 80

Document Path: /index.php
Document Length: 124070 bytes

Concurrency Level: 10
Time taken for tests: 6.996 seconds
Complete requests: 1000
Failed requests: 13
(Connect: 0, Receive: 0, Length: 13, Exceptions: 0)
Write errors: 0
Total transferred: 124447029 bytes
HTML transferred: 124070029 bytes
Requests per second: 142.94 [#/sec] (mean)
Time per request: 69.958 [ms] (mean)
Time per request: 6.996 [ms] (mean, across all concurrent requests)
Transfer rate: 17371.94 [Kbytes/sec] received

Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.2 0 3
Processing: 48 70 16.8 65 171
Waiting: 45 67 16.6 62 166
Total: 48 70 16.8 65 172

Percentage of the requests served within a certain time (ms)
50% 65
66% 73
75% 79
80% 83
90% 93
95% 102
98% 113
99% 125
100% 172 (longest request)
[root@c3po ~]#

7 seconds for 1000 requests. Was 2.2 seconds for 10. Presuming this benchmarking is accurate I think I've gotten it as good as it can get.

Anyone with any access, slow page issues, missing images, anything out of the ordinary, no matter how slight you might think it is please PM me with it so I can look into it. Nothing is a bother to us except for slow pages that we might not know about so don't worry about it.

Thanks.