Apache AB tool stress testing

Apache itself comes with a test tool AB, which is under the bin directory of Apache's installation directory.

How to Use AB:

Usage: AB [Options] [http [s]: //] hostname [: Port]/path

-N indicates the number of requests executed in the test session. By default, only one request is executed.
-C: the number of requests generated at a time. By default
-T indicates the maximum number of seconds for testing.
-V sets the details of the display information.-4 or a greater value indicates the header information. 3 or a greater value indicates the response code (404,200, etc ), 2 or a greater value can display warnings and other information. -V: Zui

The most common parameters are-N and-C, for example:

[email protected]:localhost:/usr/local/apache/bin> ./ab -n1000 -c10 http://localhost/index.php
This is ApacheBench, Version 2.3 <$Revision: 1528965 $>Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/Licensed to The Apache Software Foundation, http://www.apache.org/Benchmarking 192.168.90.222 (be patient)Completed 100 requestsCompleted 200 requestsCompleted 300 requestsCompleted 400 requestsCompleted 500 requestsCompleted 600 requestsCompleted 700 requestsCompleted 800 requestsCompleted 900 requestsCompleted 1000 requestsFinished 1000 requestsServer Software:        Boa/0.94.13Server Hostname:        192.168.90.222Server Port:            80Document Path:          /Document Length:        41 bytesConcurrency Level:      10Time taken for tests:   0.173 secondsComplete requests:      1000Failed requests:        0Total transferred:      228000 bytesHTML transferred:       41000 bytesRequests per second:    5780.51 [#/sec] (mean)Time per request:       1.730 [ms] (mean)Time per request:       0.173 [ms] (mean, across all concurrent requests)Transfer rate:          1287.07 [Kbytes/sec] receivedConnection Times (ms)              min  mean[+/-sd] median   maxConnect:        0    0   0.2      0       1Processing:     0    1   7.8      1      80Waiting:        0    1   7.3      0      76Total:          0    2   7.7      1      80Percentage of the requests served within a certain time (ms)  50%      1  66%      1  75%      1  80%      1  90%      1  95%      1  98%      2  99%     76 100%     80 (longest request)