server:/usr/local/apache2/bin# /usr/local/apache2/bin/ab -n 1000 -c 10 http://127.0.0.1/apachebench.php
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 127.0.0.1 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Finished 1000 requests


Server Software:        Apache/2.2.3
Server Hostname:        127.0.0.1
Server Port:            80

Document Path:          /apachebench.php
Document Length:        408327 bytes

Concurrency Level:      10
Time taken for tests:   38.288603 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Total transferred:      408491000 bytes
HTML transferred:       408327000 bytes
Requests per second:    26.12 [#/sec] (mean)
Time per request:       382.886 [ms] (mean)
Time per request:       38.289 [ms] (mean, across all concurrent requests)
Transfer rate:          10418.66 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   2.1      0      32
Processing:    24  381 2835.6     51   36624
Waiting:        0   95 1304.8      6   25429
Total:         24  381 2835.6     51   36624

Percentage of the requests served within a certain time (ms)
  50%     51
  66%     92
  75%    176
  80%    194
  90%    245
  95%    331
  98%    900
  99%   6381
 100%  36624 (longest request)
server:/usr/local/apache2/bin#