아파치 밴치마킹툴 ab 로 특정 웹사이트 다중 세션으로 응답속도 측정하기

[root@host3 bin]# ab -c 30 http://www.yahoo.com/
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.116 $> apache-2.0
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright (c) 1998-2002 The Apache Software Foundation, http://www.apache.org/

Benchmarking www.yahoo.com (be patient).....done

Server Software:       
Server Hostname:        www.yahoo.com
Server Port:            80

Document Path:          /
Document Length:        32247 bytes

Concurrency Level:      30
Time taken for tests:   1.75287 seconds
Complete requests:      1
Failed requests:        0
Write errors:           0
Total transferred:      32600 bytes
HTML transferred:       32247 bytes
Requests per second:    0.93 [#/sec] (mean)
Time per request:       32258.610 [ms] (mean)
Time per request:       1075.287 [ms] (mean, across all concurrent requests)
Transfer rate:          28.83 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:      208  208   0.0    208     208
Processing:   866  866   0.0    866     866
Waiting:      219  219   0.0    219     219
Total:       1074 1074   0.0   1074    1074
root@host3 bin]#