Ab
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ab - Benchmarks your Apache server by sending requests to it. For apache2, the program is named ab2.
Example:
ab2 http://www.linuxquestions.org/
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 www.linuxquestions.org (be patient).....done
Server Software: nginx/0.6.31
Server Hostname: www.linuxquestions.org
Server Port: 80
Document Path: /
Document Length: 37569 bytes
Concurrency Level: 1
Time taken for tests: 1.12974 seconds
Complete requests: 1
Failed requests: 0
Write errors: 0
Total transferred: 38097 bytes
HTML transferred: 37569 bytes
Requests per second: 0.99 [#/sec] (mean)
Time per request: 1012.974 [ms] (mean)
Time per request: 1012.974 [ms] (mean, across all concurrent requests)
Transfer rate: 36.53 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 173 173 0.0 173 173
Processing: 839 839 0.0 839 839
Waiting: 250 250 0.0 250 250
Total: 1012 1012 0.0 1012 1012