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apache:stress-testing-with-apache-benchmark [2014-12-05 13:39:39] (current)
rory.blanchard created
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 +====== How to Stress Test an Apache Server using AB (Apache Benchmark) ======
  
 +Using a benchmarking tool to test the limits of your apache server will help you prepare for upgrades.
 +\\
 +\\
 +\\
 +===== Installing AB on CentOS (with cPanel) =====
 +
 +cPanel adds in an exclusion for all packages named httpd* (any files starting with httpd) to prevent accidentally overwriting apache.
 +
 +**SSH** into your server.
 +
 +Edit **/​etc/​yum.conf** and remove the entry httpd* from the **Exclude** line
 +
 +<​code>​
 +vi /​etc/​yum.conf
 +
 +exclude=bind-chroot courier* dovecot* exim* filesystem httpd* mod_ssl* mydns* mysql* nsd* php* proftpd* pure-ftpd* spamassassin* squirrelmail*
 +</​code>​
 +
 +Once the entry has been removed, **save** the config file and exit.
 +
 +Run the following command to install ab.
 +
 +<​code>​
 +yum install httpd-tools
 +</​code>​
 +
 +Make sure to go back into the **/​etc/​yum.conf** and add **httpd* ** back to the exclude list, otherwise you risk breaking your cpanel installation.
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 +\\
 +===== Installing AB on Debian/​Ubuntu =====
 +
 +**SSH** into your server (or if you are using a desktop open a **terminal**)
 +
 +Run the following command to install ab.
 +
 +<​code>​
 +sudo apt-get install apache2-utils
 +</​code>​
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 +\\
 +\\
 +===== Running a stress test =====
 +
 +Once you have the program installed, you can run a stress test against a domain name.
 +
 +**WARNING: Do not use this against a site you do not control as it will be considered an attack.**
 +
 +Here is an example of a stress test that will simulate 100 users simultaneously making accessing a website.
 +
 +<​code>​
 +ab -c 100 -n 100 -r http://​example.com/​
 +</​code>​
 +
 +You can check the manual for ab to find out more information about it's options.
 +
 +\\
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 +\\