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<code>[[Wikipedia: sar (Unix)|sar]]</code> (System Activity Report) is a system utility command used to collect and report different metrics such us [[system load]], CPU activity, [[memory]] (<code>[[sar -r]]</code>), paging (<code>sar -B</code>), swap (<code>sar -S</code>), disk ([[sar -d]]), device load and network. It is extremely useful in analyzing current and recent recorded [[system performance]]. Most Linux distributions provide sar utility binary in the <code>sysstat</code> package. You will also find sar in Solaris, AIX, HP-UX but not in MacOs or FreeBSD. | <code>[[Wikipedia: sar (Unix)|sar]]</code> (System Activity Report) is a system utility command used to collect and report different metrics such us [[system load]], CPU activity, [[memory]] (<code>[[sar -r]]</code>), paging (<code>sar -B</code>), swap (<code>sar -S</code>), disk ([[sar -d]]), device load and network. It is extremely useful in analyzing current and recent recorded [[system performance]]. Most Linux distributions provide sar utility binary in the <code>sysstat</code> package. You will also find sar in Solaris, AIX, HP-UX but not in MacOs or FreeBSD. | ||
| − | == [[ | + | == Installation == |
| + | One line command for installation and basic configuration for collecting : | ||
| + | * Debian/Ubuntu: | ||
| + | :: <code>apt-get -y install sysstat; [[sed]] -i 's/ENABLED="false"/ENABLED="true"/g' /etc/default/sysstat && service sysstat restart && sar</code> | ||
| + | ::Optionally modify collection interval in: <code>/etc/cron.d/sysstat</code> | ||
| + | ::Optionally modify collection options in (SADC_OPTIONS="-S XALL"): <code>/etc/sysstat/sysstat</code> (<code>man sadc</code>) | ||
| + | * Redhat/Oracle Linux/AWS AMI: | ||
| + | :: <code>yum -y install sysstat && service sysstat start</code> | ||
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| − | *<code> | + | Installing sar Debian, you have to install sysstat package that includes sar and some other performance tools: |
| − | *<code> | + | * <code>[[apt-get]] -y install sysstat</code> |
| − | *<code>/usr/bin/[[ | + | * Checking installation: <code>[[dpkg]] -l sysstat</code> |
| − | + | * Binaries installed in ''/usr/bin/'' directory: <code>dpkg -L sysstat | grep "/usr/bin"</code>. Sysstat package contains sar and some other utilities. | |
| − | + | * [[Installing sysstat using Ansible]] | |
| + | <pre> | ||
| + | /usr/bin/sadc - System Activity Data Collector, a backend to the sar command. Writes binary log of kernel data to the /var/log/sa/saXX file, where the XX parameter indicates the current day | ||
| + | /usr/bin/sadf - System Activity Data Formatter. Display data collected by sar in multiple formats. | ||
| + | /usr/bin/sar.sysstat (sar is a symbolink link to this binary) | ||
| + | </pre> | ||
| + | <pre> | ||
| + | /usr/bin/cifsiostat | ||
| + | /usr/bin/iostat | ||
| + | /usr/bin/mpstat | ||
| + | /usr/bin/pidstat | ||
| + | /usr/bin/tapestat | ||
| + | </pre> | ||
| − | + | * Config files: | |
| − | + | Debian/Ubuntu: | |
| − | :<code> | + | :<code> /etc/default/sysstat</code> |
| − | :<code> | + | :<code> /etc/cron.d/sysstat</code> // Collection interval defined in cron configuration |
| − | :<code> | + | :<code> /etc/sysstat/sysstat</code> |
:<code>/etc/sysstat/sysstat.ioconf</code> | :<code>/etc/sysstat/sysstat.ioconf</code> | ||
| − | ::Data directory: <code> | + | ::Data directory: <code>/var/log/sysstat</code> |
| − | + | <pre> RedHat | |
| − | + | cat /etc/sysconfig/sysstat | |
| − | + | cat /etc/cron.d/sysstat | |
| + | </pre> | ||
== Activation in Debian == | == Activation in Debian == | ||
| − | * To start collection data modify file <code> | + | * To start collection data modify file <code>/etc/default/sysstat</code>, changing text <code>disabled</code> by <code>enabled</code>: <code>vi /etc/default/sysstat</code> |
| − | * <code> | + | * <code>service sysstat restart</code> (sysstat written with two "ss" do not misspell with systat with just one "s") |
Modifying number of days to keep and some other options are done in <code>/etc/sysstat/sysstat</code> file. By default Debian collect files for <code>HISTORY=7</code> 7 days. | Modifying number of days to keep and some other options are done in <code>/etc/sysstat/sysstat</code> file. By default Debian collect files for <code>HISTORY=7</code> 7 days. | ||
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=== Collection interval configuration === | === Collection interval configuration === | ||
To change for every 10 minutes to every 2 minutes or every minute, modify [[cron]] job in file: <code>/etc/cron.d/sysstat</code> | To change for every 10 minutes to every 2 minutes or every minute, modify [[cron]] job in file: <code>/etc/cron.d/sysstat</code> | ||
| − | + | <pre> | |
| − | + | 5-55/10 * * * * root command -v debian-sa1 > /dev/null && debian-sa1 1 1 | |
| − | + | Every 2 minutes | |
| − | + | */2 * * * * root command -v debian-sa1 > /dev/null && debian-sa1 1 1 | |
| − | + | Every minute | |
| − | + | * * * * * root command -v debian-sa1 > /dev/null && debian-sa1 1 1 | |
| − | + | </pre> | |
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== Usage == | == Usage == | ||
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Binaries | Binaries | ||
| − | * <code> | + | * <code>/usr/bin/sar</code> -- reporting utility -- it is a link to /usr/bin/sar.sysstat |
* <code>/usr/lib64/sa/sadc</code> -- System activity data collector binary, a backend to the sar command. Writes binary log of kernel data to the /var/log/sa/sadd file, where the dd parameter indicates the current day | * <code>/usr/lib64/sa/sadc</code> -- System activity data collector binary, a backend to the sar command. Writes binary log of kernel data to the /var/log/sa/sadd file, where the dd parameter indicates the current day | ||
| − | + | Scripts | |
| − | * <code>/usr/lib64/sa/ | + | * <code>/usr/lib64/sa/sa1</code> |
| − | * <code>/usr/lib64/sa/ | + | * <code>/usr/lib64/sa/sa2</code> |
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== Basic Usage == | == Basic Usage == | ||
* Displays collected system activity, execute <code>sar</code>, you will have to wait some time, depending on your configuration, for getting collected information: | * Displays collected system activity, execute <code>sar</code>, you will have to wait some time, depending on your configuration, for getting collected information: | ||
| − | :<code> | + | :<code>sar</code> |
| − | :<code> | + | :<code>sar -A</code> Report all collected date |
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'''[[Memory]]''' | '''[[Memory]]''' | ||
:<code>[[sar -r]]</code> | :<code>[[sar -r]]</code> | ||
| − | + | '''Disk''' | |
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| − | '''Disk | ||
:<code>[[sar -d]]</code> To report disk activity. See also <code>[[iostat]] -x</code>. | :<code>[[sar -d]]</code> To report disk activity. See also <code>[[iostat]] -x</code>. | ||
| − | :<code>[[sar -F]]</code> To report | + | :<code>[[sar -F]]</code> To report disk and [[inodes]] usage. Requires sadc option in <code>/etc/sysstat/sysstat</code> -S XDISK or -S XALL activated. |
| − | ''' | + | '''network''' |
| − | :<code> | + | :<code>sar -n ALL</code> To show '''network''' data collected |
'''power management''' | '''power management''' | ||
:<code>sar -m ALL</code> To show [[power management]] data collected including [[cpu temperature]] (Requires <code>[[sensors]]/[[lm-sensors]]</code> utility to be installed) | :<code>sar -m ALL</code> To show [[power management]] data collected including [[cpu temperature]] (Requires <code>[[sensors]]/[[lm-sensors]]</code> utility to be installed) | ||
| − | '''[[ | + | '''[[process]]''' |
:<code>[[sar -q]]</code> | :<code>[[sar -q]]</code> | ||
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== Activities == | == Activities == | ||
# Install and configure sar to record system activity every 5 minutes | # Install and configure sar to record system activity every 5 minutes | ||
# Read [[sysstat changelog]]: https://github.com/sysstat/sysstat/blob/master/CHANGES | # Read [[sysstat changelog]]: https://github.com/sysstat/sysstat/blob/master/CHANGES | ||
| − | # Read data from day 07 to day 11: <code>echo | + | # Read data from day 07 to day 11: <code>echo sa{07..11} | [[xargs]] -n1 sar -f</code> |
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== See also == | == See also == | ||
| + | * [[monitoring]] | ||
* {{io performance commands}} | * {{io performance commands}} | ||
| − | * | + | * [[netdata]], [[MetricBeat]] |
| + | * [http://sebastien.godard.pagesperso-orange.fr System Activity Report Homepage] | ||
| + | * isag - [[wikipedia:tcl]] based command to plot sar/sysstat data | ||
| + | * sargraph https://github.com/sysstat/sysstat/blob/master/contrib/sargraph/sargraph2 | ||
| + | * [[w:Ksar (Unix sar grapher)]] | ||
* systat [[FreeBSD]]<ref>https://www.freebsd.org/cgi/man.cgi?query=systat&apropos=0&sektion=1&manpath=FreeBSD+Ports+11.2&arch=default&format=html</ref> or NetBSD commands. | * systat [[FreeBSD]]<ref>https://www.freebsd.org/cgi/man.cgi?query=systat&apropos=0&sektion=1&manpath=FreeBSD+Ports+11.2&arch=default&format=html</ref> or NetBSD commands. | ||
| − | * | + | * Telegraph https://docs.influxdata.com/telegraf/v1.12/introduction/getting-started/ |
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[[Category:Server administration]] | [[Category:Server administration]] | ||
| + | [[Category:Operating systems]] | ||
| + | [[Category:Linux]] | ||
[[Category:monitoring]] | [[Category:monitoring]] | ||
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