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Apache Bench for Load Testing

AB( Apache Bench) is a command line utility to measure performance of any web server. It’s originally designed to test the Apache HTTP server. AB is free open source software and distributed under the terms of the Apache License.

It’s good practice to Benchmark performance of the any server before deployment. AB tool will shows you how many request per second your webserver can handle.

To measure performance of web server pass a certain number of concurrent request and some number of repetition and check AB result. I would recommend you start from small concurrent and repetition. Increase the number of concurrent request and repetition untill your result not fail or your webserver load reaches your defined limit.

Installation:

In Ubuntu: 

Refresh the package database.

$ apt-get update

Install the apache2-utils package to get access to ApacheBench.

$ apt-get install apache2-utils

In Redhat or Centos:

Install httpd-tools to get AB tool.

$ yum install httpd-tools

Usages:

$ ab -n 10 -c 10 http://localhost/index.php

Parameter Description:

  • -n 10: ab will send 10 number of requests to server localhost.
  • -c 10 : 10 multiple requests to perform at a time. Default is one request at a time.

Output:

ab -n 10 -c 10 http://localhost/index.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 localhost (be patient).....done

Server Software:        Apache
Server Hostname:        localhost
Server Port:            80
Document Path:          /
Document Length:        38879 bytes
Concurrency Level:      10
Time taken for tests:   6.401 seconds
Complete requests:      10
Failed requests:        0
Write errors:           0
Total transferred:      392381 bytes
HTML transferred:       388790 bytes
Requests per second:    1.56 [#/sec] (mean)
Time per request:       6400.818 [ms] (mean)
Time per request:       640.082 [ms] (mean, across all concurrent requests)
Transfer rate:          59.86 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:      365  366   0.7    366     367
Processing:  2214 3170 1171.5   3006    6020
Waiting:     1634 2424 775.4   2430    3924
Total:       2580 3537 1171.6   3371    6387

Percentage of the requests served within a certain time (ms)
  50%   3371
  66%   3580
  75%   3603
  80%   4516
  90%   6387
  95%   6387
  98%   6387
  99%   6387
 100%   6387 (longest request)
Apache bench for load testing and performance benchmarkhttp://techieroop.com/wp-content/uploads/2015/04/ApacheBench.jpghttp://techieroop.com/wp-content/uploads/2015/04/ApacheBench-150x150.jpg Roopendra LinuxTesting,,,
Apache Bench for Load Testing AB( Apache Bench) is a command line utility to measure performance of any web server. It's originally designed to test the Apache HTTP server. AB is free open source software and distributed under the terms of the Apache License.It's good practice to Benchmark performance of...
<h2>Apache Bench for Load Testing</h2> <strong>AB</strong>( Apache Bench) is a command line utility to measure performance of any web server. It's originally designed to test the Apache <strong>HTTP</strong> server. AB is free open source software and distributed under the terms of the Apache License.It's good practice to Benchmark performance of the any server before deployment. <strong>AB</strong> tool will shows you how many request per second your webserver can handle.To measure performance of web server pass a certain number of concurrent request and some number of repetition and check AB result. I would recommend you start from small concurrent and repetition. Increase the number of concurrent request and repetition untill your result not fail or your webserver load reaches your defined limit.<strong>Installation:</strong><em>In Ubuntu: </em>Refresh the package database. <pre>$ apt-get update</pre> Install the apache2-utils package to get access to ApacheBench. <pre>$ apt-get install apache2-utils</pre> <em>In Redhat or Centos:</em>Install httpd-tools to get AB tool. <pre>$ yum install httpd-tools</pre> <strong>Usages:</strong> <pre>$ ab -n 10 -c 10 http://localhost/index.php</pre> <strong>Parameter Description:</strong> <ul> <li>-n 10: ab will send 10 number of requests to server localhost.</li> <li>-c 10 : 10 multiple requests to perform at a time. Default is one request at a time.</li> </ul> <strong>Output:</strong> <pre>ab -n 10 -c 10 http://localhost/index.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 localhost (be patient).....doneServer Software: Apache Server Hostname: localhost Server Port: 80 Document Path: / Document Length: 38879 bytes Concurrency Level: 10 Time taken for tests: 6.401 seconds Complete requests: 10 Failed requests: 0 Write errors: 0 Total transferred: 392381 bytes HTML transferred: 388790 bytes Requests per second: 1.56 [#/sec] (mean) Time per request: 6400.818 [ms] (mean) Time per request: 640.082 [ms] (mean, across all concurrent requests) Transfer rate: 59.86 [Kbytes/sec] receivedConnection Times (ms) min mean[+/-sd] median max Connect: 365 366 0.7 366 367 Processing: 2214 3170 1171.5 3006 6020 Waiting: 1634 2424 775.4 2430 3924 Total: 2580 3537 1171.6 3371 6387Percentage of the requests served within a certain time (ms) 50% 3371 66% 3580 75% 3603 80% 4516 90% 6387 95% 6387 98% 6387 99% 6387 100% 6387 (longest request)</pre>
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