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sysstat - System performance tools for the Linux operating system

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  1. 1999-2019 Sebastien GODARD (sysstat (at) orange (dot) fr)


The sysstat package contains various utilities, common to many commercial Unixes, to monitor system performance and usage activity:

Sysstat also contains tools you can schedule via cron or systemd to collect and historize performance and activity data:

Default sampling interval is 10 minutes but this can be changed of course (it can be as small as 1 second).

System statistics collected by sar:

Sysstat key features:

Smart color output - Internationalization support (sysstat has been translated into numerous different languages). Sysstat is now part of the Translation Project. - Sysstat commands can automatically select the unit used to display sizes for easier reading (see option --human):

Sample iostat output
Fancy sysstat graph
Fancy sysstat graph
Fancy sysstat graph

Sysstat is Open Source / Free Software, and is freely available under the GNU General Public License, version 2. The latest version of sysstat can always be found on my web site at:


See the CHANGES file to know the new features/improvements/bug fixes added in this release of sysstat. Sysstat development can be tracked on GitHub.


Install from RHEL/Fedora/CentOS


$ sudo yum install sysstat

CentOS and Fedora systems call the collector process using a cron job in /etc/cron.d and it’s enabled by default. On recent versions, systemd is used instead of cron. You may need to enable and start the sysstat service:

$ sudo systemctl enable sysstat
$ sudo systemctl start sysstat

Install from Ubuntu


$ sudo apt-get install sysstat

Then enable data collecting:

$ sudo vi /etc/default/sysstat
change ENABLED="false" to ENABLED="true"
save the file

Last, restart the sysstat service:

$ sudo service sysstat restart

Install from sources

Clone sysstat public repository with:

$ git clone git://github.com/sysstat/sysstat

Then configure sysstat for your system:

$ cd sysstat
$ ./configure

You can set several variables and parameters on the command line. For example you can enter the following option to activate data collecting (either using cron or systemd):

$ ./configure --enable-install-cron

Enter ./configure --help to display all possible options.
Note: There is another way to configure sysstat instead of entering ./configure: This is the Interactive Configuration script (iconfig) which will ask you for the value of the main sysstat variables and parameters. Enter ./iconfig then answer the questions or enter Return to accept the (sane) default values. For yes/no questions, answer ‘y’ or ‘n’ (without the quotes): It is case sensitive! You can also enter ‘?’ to get a help message that will explain the meaning of each variable or parameter.

Compile and install:

$ make
$ sudo make install

Feedback welcome!

Please use the BUG_REPORT template file to report a bug: It contains important data that should be provided for this. Please also remember to read the FAQ that comes with sysstat or is available from the Wiki page on GitHub.

Opening a pull request is the preferred way to submit a patch. Patches and suggestions for improvements are always welcome!

Support sysstat!

If you are reading this README file then you are probably about to use the sysstat tools to help you monitor your system and maybe troubleshoot some performance issues. Good choice. Sysstat is made for you. Moreover sysstat is free software and always will be.

Yet have you ever considered making a donation to sysstat, regardless of how much your contribution is? This in turn would encourage me to keep up the work as good as it can be… Oh, and it would certainly also help me explain to my wife why I spend so much time in front of my computer instead of taking care of the household ;-)

Click on the “Donate PayPal” button above at the beginning of this file. You can also make a donation from my web page.


Sebastien GODARD - sysstat (at) orange (dot) fr