Stable release | sysstat 12.1.1[1] / October 13, 2018; 8 months ago |
---|---|
Preview release | |
Repository | github.com/sysstat/sysstat/ |
Written in | C |
Operating system | AIX, Linux, Solaris, HP-UX |
Type | System reporting |
Website | sebastien.godard.pagesperso-orange.fr// |
Called regularly by cron, sadc does the monitoring and stores its measurements to files in the /var/log/sa/ folder. The sar client can be used to explore this data.
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]Platform support[edit]
Sar was originally developed for Solaris operating system[4] and it is available in Linux, Solaris, AIX, HP-UX, but it is not available for MacOS or FreeBSD, until 2013 there was a
bsdsar
tool actually deprecated [5]. Linux distributions, such as Red Hat Enterprise Linux and SuSe[6] provide
sar
utility through the sysstat
package.Syntax[edit]
- -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]
Sysstat package[edit]
How To Diagnose Sar Command In Linux
Lords of the fallen forum. Additional to
sar
command, Linux sysstat package in Debian[7], RedHat Enterprise Linux and SuSE provides additional reporting tools:Sar Report Linux Graph
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 ofsar
, supporting the same flags assar
command which write a daily report in the /var/log/sa directory. – Linux Administration and Privileged Commands Manualsadf(1)
: , similar tosar
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 Manual
See also[edit]
sag
- 'system activity graph' command[8]- 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]
sar(1)
– Solaris 10 User Commands Reference Manual
Footnotes[edit]
- ^https://github.com/sysstat/sysstat/releases/tag/v12.1.1
- ^http://sebastien.godard.pagesperso-orange.fr/
- ^http://sebastien.godard.pagesperso-orange.fr/man_sar.html
- ^https://www.itworld.com/article/2786092/open-source-tools/unix-tip--using-sar-for-long-term-performance-analysis.html
- ^https://www.freshports.org/sysutils/bsdsar
- ^http://www.softpanorama.org/Admin/Monitoring/sar.shtml
- ^https://packages.debian.org/sid/sysstat
- ^'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.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Sar_(Unix)&oldid=868568010'
Here is the output of sar command. I want to add the %user and %system from the average and if its more than 75 percent send an email to user. please help and also please let me know if there is any better method to calculate cpu usage.
Brian Agnew233k3434 gold badges290290 silver badges401401 bronze badges
Linux Sar Monthly Report
mishra1010mishra1010
2 Answers
Istvan KonczIstvan Koncz
If you want current utilization, 'sar 5 6' instead of 'sar' will check at 5-second intervals for half a minute.
DavidDavid