Apacheのチューニングその1

top - 01:34:42 up 5 days,  3:43,  1 user,  load average: 0.00, 0.04, 0.07
Tasks:  88 total,   1 running,  87 sleeping,   0 stopped,   0 zombie
Cpu(s):  1.6%us,  0.7%sy,  0.0%ni, 97.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:    126988k total,   124756k used,     2232k free,     1836k buffers
Swap:   248996k total,   139120k used,   109876k free,    18572k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 9467 www-data  18  -2 53088  21m 2576 S  0.0 17.6   2:14.61 apache2
 2918 www-data  18  -2 57124  18m 2540 S  0.0 15.2   4:02.94 apache2
 2953 www-data  18  -2 43300  13m 2712 S  0.0 10.9   3:21.64 apache2
 2978 www-data  18  -2 46400  11m 2732 S  0.0  9.3   3:37.18 apache2
 9310 www-data  18  -2 52124  10m 3260 S  0.0  8.4   2:17.84 apache2
 9575 www-data  18  -2 48244 8332 2700 S  0.0  6.6   1:11.07 apache2
 9446 www-data  18  -2 51640 5672 3100 S  0.0  4.5   1:37.59 apache2
 1390 Guest     20   0 14412 3864 3012 S  0.0  3.0   1:54.36 smbd
 9733 www-data  18  -2 44044 3840 2872 S  0.0  3.0   0:08.50 apache2
 9424 www-data  18  -2 44852 3200 2360 S  0.0  2.5   2:25.17 apache2
 1355 mysql     20   0  131m 2884 1304 S  0.0  2.3   0:15.79 mysqld
16181 openldap  18  -2 60136 2616 1612 S  0.0  2.1   0:44.96 slapd
 9482 www-data  18  -2 53080 2552 2088 S  0.0  2.0   1:14.60 apache2
 2845 root      18  -2 10680 2164 2016 S  0.0  1.7   0:00.60 sshd

こんな感じでApacheが上位を占めています・・・

この状態でWordpressのトップページを表示する時間を測定。
Apacheのベンチマークツールabを使用します。

$ sudo ab http://gwazine/~lalah/wp/
Password:
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 gwazine (be patient).....done


Server Software:        Apache/2.2.9
Server Hostname:        gwazine
Server Port:            80

Document Path:          /~lalah/wp/
Document Length:        5670 bytes

Concurrency Level:      1
Time taken for tests:   25.712 seconds
Complete requests:      1
Failed requests:        0
Write errors:           0
Total transferred:      6039 bytes
HTML transferred:       5670 bytes
Requests per second:    0.04 [#/sec] (mean)
Time per request:       25711.646 [ms] (mean)
Time per request:       25711.646 [ms] (mean, across all concurrent requests)
Transfer rate:          0.23 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        1    1   0.0      1       1
Processing: 25711 25711   0.0  25711   25711
Waiting:    25670 25670   0.0  25670   25670
Total:      25711 25711   0.0  25711   25711
スクリプト(php)を処理するからとは言え、6K程度のページを表示するのに25秒って・・・ないわ～～
 
ちなみに、ごく一般的なHTMLを表示するのはこれくらい。
玄箱だから遅い。ということはなさそうです。
Server Software:        Apache/2.2.9
Server Hostname:        gwazine
Server Port:            80

Document Path:          /~dren/
Document Length:        4152 bytes

Concurrency Level:      1
Time taken for tests:   0.361 seconds
Complete requests:      1
Failed requests:        0
Write errors:           0
Total transferred:      4528 bytes
HTML transferred:       4152 bytes
Requests per second:    2.77 [#/sec] (mean)
Time per request:       361.387 [ms] (mean)
Time per request:       361.387 [ms] (mean, across all concurrent requests)
Transfer rate:          12.24 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        1    1   0.0      1       1
Processing:   360  360   0.0    360     360
Waiting:      359  359   0.0    359     359
Total:        361  361   0.0    361     361