 |
This article is written like a manual or guide. Please help rewrite this article and remove advice or instruction. (July 2023)
|
| Stable release | sysstat 12.1.1[1] / October 13, 2018; 5 years ago (2018-10-13) |
|---|---|
| Preview release | sysstat 11.7.4 / June 1, 2018; 6 years ago (2018-06-01) [2] |
| Repository | github |
| Written in | C |
| Operating system | AIX, Linux, Solaris, HP-UX |
| Type | System reporting |
| Website | sebastien |
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.[3]
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.[4]
Most Linux distributions provide sar utility through the sysstat package.
sar [-flags] [ -e time ] [ -f filename ] [-i sec ] [ -s time ]
[user@localhost]$ sar # Displays current CPU activity.
Additional to sar command, Linux sysstat package in Debian,[5] RedHat Enterprise Linux and SuSE provides additional reporting tools:
sar(1): Collect, report, or save system activity information. – Linux User Commands Manualsa1(8): Collect and store binary data in the system activity daily data file. – Linux Administration and Privileged Commands Manualsa2(8): shell variant of sar, supporting the same flags as sar command which write a daily report in the /var/log/sa directory. – Linux Administration and Privileged Commands Manualsadf(1): , similar to 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.iostat(1): reports basic CPU statistics and input/output statistics for devices, partitions and network filesystems. – Linux User Commands Manualmpstat(1): reports individual or combined processor related statistics. – Linux User Commands Manualpidstat(1): reports statistics for Linux tasks (processes) : I/O, CPU, memory, etc. – Linux User Commands Manualnfsiostat(1): reports input/output statistics for network filesystems (NFS). – Linux User Commands Manualcifsiostat(1): reports I/O statistics for CIFS resources. – Linux User Commands Manualsag - "system activity graph" command[6]sar(1) – Solaris 11.4 User Commands Reference Manualsag - system activity graph [...] DESCRIPTION sag graphically displays the system activity data stored in a binary data file by a previous sar(1) run.
