| Latest release version | sysstat 12.7.6[1] |
|---|---|
| Latest release date | July 3, 2024 (age 2) |
| Operating system | AIX, Linux, Solaris, HP-UX |
| Genre | System reporting |
| Programming language | C |
| Repo | github.com/sysstat |
| Website | sysstat.github.io |
System Activity Report (sar) is a Unix System V-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, interrupts, device load, network and swap space utilization. Sar uses /proc filesystem for gathering information.[2]
Platform support
Sar was originally developed for the Unix System V operating system; it is available in AIX, HP-UX, Solaris and other System V based operating systems but it is not available for macOS or FreeBSD. Prior to 2013 there was a bsdsar tool, but it is now deprecated.[3]
Most Linux distributions provide sar utility through the sysstat package.
Syntax
sar [-flags] [ -e time ] [ -f filename ] [-i sec ] [ -s time ]
-f- filename Uses filename as the data source for sar. The default is the current daily data file /var/adm/sa/sadd.
-e- time Selects data up to time. The default is 18:00.
-i- sec Selects data at intervals as close as possible to sec seconds.
Example
[user@localhost]$ sar # Displays current CPU activity.
Sysstat package
Additional to sar command, Linux sysstat package in Debian,[4] RedHat Enterprise Linux and SuSE provides additional reporting tools:
See also
- atopsar
- Nmon
sag- "system activity graph" command[5]- ksar- BSD licensed Java-based application to create graph of all parameters from the data collected by Unix sar utilities.
- CURT, IBM AIX CPU Usage Reporting Tool
- isag, tcl based command to plot sar/sysstat data
References
- Easy system monitoring with SAR (IBM developerWorks)
- System Activity Reporter (Softpanorama)
- Article on sar at Computerhope
Footnotes
- ^ "Sysstat: Tags". GitHub
- ^ "SYSSTAT". sebastien.godard.pagesperso-orange.fr
- ^ "FreshPorts -- sysutils/bsdsar: System Activity Reporter for FreeBSD". www.freshports.org
- ^ "Debian -- Details of package sysstat in sid". packages.debian.org
- ^ "sag(1)". SUNOS Reference Manual. Mountain View, California: Sun Microsystems. 1993-02-24. pp. 1–895. Retrieved 2010-05-04.
sag - system activity graph [...] DESCRIPTION sag graphically displays the system activity data stored in a binary data file by a previous sar(1) run.