[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:        nginx/1.2.0
Server Hostname:        192.168.1.121
Server Port:            80

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

Concurrency Level:      50
Time taken for tests:   13.179 seconds
Complete requests:      2000
Failed requests:        0
Write errors:           0
Total transferred:      320000 bytes
HTML transferred:       24000 bytes
Requests per second:    151.76 [#/sec] (mean)
Time per request:       329.472 [ms] (mean)
Time per request:       6.589 [ms] (mean, across all concurrent requests)
Transfer rate:          23.71 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        1    4   4.9      3      55
Processing:    61  322  32.6    324     620
Waiting:       61  321  31.5    324     569
Total:         75  326  30.9    328     624

Percentage of the requests served within a certain time (ms)
  50%    328
  66%    334
  75%    339
  80%    342
  90%    351
  95%    360
  98%    372
  99%    383
 100%    624 (longest request)