sar (Unix)
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This article is written like a manual or guide. (July 2023) |
Stable release | sysstat 12.7.6[1]
/ July 3, 2024 |
---|---|
Repository | github |
Written in | C |
Operating system | AIX, Linux, Solaris, HP-UX |
Type | System reporting |
Website | sysstat |
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
[edit]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
[edit]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
[edit][user@localhost]$ sar # Displays current CPU activity.
Sysstat package
[edit]Additional to sar
command, Linux sysstat package in Debian,[4] RedHat Enterprise Linux and SuSE provides additional reporting tools:
- Linux User Commands Manual : Collect, report, or save system activity information. –
- Linux Administration and Privileged Commands Manual : Collect and store binary data in the system activity daily data file. –
sar
, supporting the same flags assar
command which write a daily report in the /var/log/sa directory. – Linux Administration and Privileged Commands Manual
: shell variant of sar
but can write its data in different formats (CSV, XML, etc.). This is useful to load performance data into a database, or import them in a spreadsheet to make graphs.
: , similar to - reports basic CPU statistics and input/output statistics for devices, partitions and network filesystems. – Linux User Commands Manual :
- Linux User Commands Manual : reports individual or combined processor related statistics. –
- Linux User Commands Manual : reports statistics for Linux tasks (processes) : I/O, CPU, memory, etc. –
- Linux User Commands Manual : reports input/output statistics for network filesystems (NFS). –
- CIFS resources. – Linux User Commands Manual : reports I/O statistics for
See also
[edit]- 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
[edit]- Solaris 11.4 User Commands Reference Manual –
- Easy system monitoring with SAR (IBM developerWorks)
- System Activity Reporter (Softpanorama)
- Article on sar at Computerhope
Footnotes
[edit]- ^ "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)" (PDF). 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.