Apacheのチューニング

HostNameLookupsをoffにして再計測

結論：
HostNameLookupsは重い。
ていうか、そもそもにこの機能、いらないんじゃない？少なくともonlineでlookupする意味がわからない。logを解析するなんてバッチか裏方の仕事だから、リアルタイムで知る必要はそれほど無いのでは？

毎秒1000リクエストは現状の設定でのキャパを超えている。160m secで応答する範囲がキャパ。まずは２分探索してみよう。

[nori@asama]~/Desktop/work/srvtest% ab -n 100000 -c 100 "http://image.backgammonbase.com/image?gnubgid=4HPwATDgc%2FABMA%3AMAAAAAAAAAAA&height=300&width=400&css=minimal&format=png"
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright 2006 The Apache Software Foundation, http://www.apache.org/

Benchmarking image.backgammonbase.com (be patient)
Completed 10000 requests
Completed 20000 requests
Completed 30000 requests
Completed 40000 requests
Completed 50000 requests
Completed 60000 requests
Completed 70000 requests
Completed 80000 requests
Completed 90000 requests
Finished 100000 requests


Server Software:        CherryPy/2.3.0
Server Hostname:        image.backgammonbase.com
Server Port:            80

Document Path:          /image?gnubgid=4HPwATDgc%2FABMA%3AMAAAAAAAAAAA&height=300&width=400&css=minimal&format=png
Document Length:        17877 bytes

Concurrency Level:      100
Time taken for tests:   158.198941 seconds
Complete requests:      100000
Failed requests:        0
Write errors:           0
Total transferred:      1827006003 bytes
HTML transferred:       1787990744 bytes
Requests per second:    632.12 [#/sec] (mean)
Time per request:       158.199 [ms] (mean)
Time per request:       1.582 [ms] (mean, across all concurrent requests)
Transfer rate:          11278.11 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0   35  11.0     37      51
Processing:    38  122 156.4    119   10326
Waiting:       11   51 158.2     39   10249
Total:         50  157 155.9    157   10346

Percentage of the requests served within a certain time (ms)
  50%    157
  66%    157
  75%    157
  80%    157
  90%    157
  95%    158
  98%    160
  99%    161
 100%  10346 (longest request)
[nori@asama]~/Desktop/work/srvtest% ab -n 100000 -c 1000 "http://image.backgammonbase.com/image?gnubgid=4HPwATDgc%2FABMA%3AMAAAAAAAAAAA&height=300&width=400&css=minimal&format=png"
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright 2006 The Apache Software Foundation, http://www.apache.org/

Benchmarking image.backgammonbase.com (be patient)
Completed 10000 requests
Completed 20000 requests
Completed 30000 requests
Completed 40000 requests
Completed 50000 requests
Completed 60000 requests
Completed 70000 requests
Completed 80000 requests
Completed 90000 requests
Finished 100000 requests


Server Software:        Apache/2.2.3
Server Hostname:        image.backgammonbase.com
Server Port:            80

Document Path:          /image?gnubgid=4HPwATDgc%2FABMA%3AMAAAAAAAAAAA&height=300&width=400&css=minimal&format=png
Document Length:        17877 bytes

Concurrency Level:      1000
Time taken for tests:   158.458777 seconds
Complete requests:      100000
Failed requests:        0
Write errors:           0
Total transferred:      1827084829 bytes
HTML transferred:       1788031055 bytes
Requests per second:    631.08 [#/sec] (mean)
Time per request:       1584.588 [ms] (mean)
Time per request:       1.585 [ms] (mean, across all concurrent requests)
Transfer rate:          11260.10 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0  502 3078.7     64   93077
Processing:    16  663 875.5    403   57571
Waiting:        2  540 873.5    278   57445
Total:         36 1165 3251.3    656   94293

Percentage of the requests served within a certain time (ms)
  50%    656
  66%    724
  75%    733
  80%   1235
  90%   1308
  95%   3456
  98%   8803
  99%   9725
 100%  94293 (longest request)