[root@vmdev ~]# ab -n 2000 -c 50 -r http://192.168.1.121/test.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 192.168.1.121 (be patient)
Completed 200 requests
Completed 400 requests
Completed 600 requests
Completed 800 requests
Completed 1000 requests
Completed 1200 requests
Completed 1400 requests
Completed 1600 requests
Completed 1800 requests
Completed 2000 requests
Finished 2000 requests


Server Software:        Apache/2.2.22
Server Hostname:        192.168.1.121
Server Port:            80

Document Path:          /test.php
Document Length:        12 bytes

Concurrency Level:      50
Time taken for tests:   12.067 seconds
Complete requests:      2000
Failed requests:        0
Write errors:           0
Total transferred:      428000 bytes
HTML transferred:       24000 bytes
Requests per second:    165.75 [#/sec] (mean)
Time per request:       301.668 [ms] (mean)
Time per request:       6.033 [ms] (mean, across all concurrent requests)
Transfer rate:          34.64 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        1    5   5.2      3      49
Processing:    10  293 129.6    277    1174
Waiting:       10  249 109.6    249    1121
Total:         13  298 128.9    282    1177

Percentage of the requests served within a certain time (ms)
  50%    282
  66%    317
  75%    343
  80%    361
  90%    431
  95%    494
  98%    640
  99%    822
 100%   1177 (longest request)