Sar (sysstat) - Revision history

Christoph: /* External links */

2014-07-28T05:04:32Z

‎External links

Christoph: /* External links */

2014-07-28T05:04:16Z

‎External links

Christoph: /* See also */

2014-07-28T05:01:19Z

‎See also

Christoph at 14:25, 12 November 2013

2013-11-12T14:25:37Z

Christoph at 01:11, 10 November 2013

2013-11-10T01:11:53Z

Christoph: /* Example usage */

2013-11-10T01:11:07Z

‎Example usage

Christoph at 23:13, 9 November 2013

2013-11-09T23:13:13Z

Christoph: New page: In computing, `sar` (System Activity Report) is a Solaris-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, device ...

2013-11-09T21:49:40Z

New page: In computing, <code>`sar`</code> (System Activity Report) is a Solaris-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, device ...

New page

In computing, <code>`sar`</code> (System Activity Report) is a Solaris-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, device load, network, etc. Linux distributions provide <code>`sar`</code> through the <code>sysstat</code> package.

==Utilities==
The sysstat package contains the following system performance tools:
;<code>sar</code>: collects and reports system activity information
;<code>iostat</code>: reports CPU utilization and disk I/O statistics
;<code>mpstat</code>: reports global and per-processor statistics
;<code>pidstat</code>: reports statistics for Linux tasks (processes)
;<code>sadf</code>: displays data collected by sar in various formats
;<code>nfsiostat</code>: reports I/O statistics for network filesystems
;<code>cifsiostat</code>: reports I/O statistics for CIFS filesystems

The statistics reported by <code>`sar`</code> deal with I/O transfer rates, paging activity, process-related activities, interrupts, network activity, memory and swap space utilization, CPU utilization, kernel activities, and TTY statistics, among others. Both UP and SMP machines are fully supported.

==External links==
* [http://pagesperso-orange.fr/sebastien.godard/ Official website]

[[Category:Linux Command Line Tools]]

@@ Line 86: / Line 86: @@
 ==See also==
-* bwm-ng
+* [http://www.gropp.org/?id=projects&sub=bwm-ng bwm-ng] (aka "Bandwidth Monitor NG") &mdash; a small and simple console-based live network and disk io bandwidth monitor for Linux
-* traceroute
+* [http://traceroute.sourceforge.net/ traceroute]
-* mtr
+* [http://www.bitwizard.nl/mtr/ mtr] &mdash; combines the functionality of the 'traceroute' and 'ping' programs in a single network diagnostic tool.
-* [http://humdi.net/vnstat/ vnStat]
+* [http://humdi.net/vnstat/ vnStat] &mdash; a console-based network traffic monitor for Linux
-* ntop
+* [http://iptraf.seul.org/about.html IPTraf] &mdash; a console-based network statistics utility for Linux
-* iftop
+* [http://www.ntop.org/ ntop] &mdsah; a network traffic probe that shows the network usage
 ==External links==

@@ Line 84: / Line 84: @@
   $ sar -P 1 1 3 # Displays real time CPU usage for core number 1, every 1 second for 3 times.
   $ sar -P ALL -f /var/log/sa/sa10  # Displays CPU usage broken down by all cores for the 10day day of the month from sa10 file.
 ==External links==

← Older revision		Revision as of 01:11, 10 November 2013
Line 1:		Line 1:
	In computing, <code>`sar`</code> (System Activity Report) is a Solaris-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, device load, network, etc. Linux distributions provide <code>`sar`</code> through the <code>sysstat</code> package.		In computing, <code>`sar`</code> (System Activity Report) is a Solaris-derived system monitor command used to report on various system loads, including CPU activity, memory/paging, device load, network, etc. Linux distributions provide <code>`sar`</code> through the <code>sysstat</code> package.
		+
		+	These utilities are especially useful in Cloud Computing.

	==Utilities==		==Utilities==

@@ Line 41: / Line 41: @@
 * CPU usage for second day of the month (Note: On some distros, the location of the <code>`sar`</code> logs is stored under <code>/var/log/sa/</code>):
-  sar -u -f /var/log/sysstat/sa02
+  $ sar -u -f /var/log/sysstat/sa02
 ==External links==

← Older revision		Revision as of 23:13, 9 November 2013
Line 12:		Line 12:

	The statistics reported by <code>`sar`</code> deal with I/O transfer rates, paging activity, process-related activities, interrupts, network activity, memory and swap space utilization, CPU utilization, kernel activities, and TTY statistics, among others. Both UP and SMP machines are fully supported.		The statistics reported by <code>`sar`</code> deal with I/O transfer rates, paging activity, process-related activities, interrupts, network activity, memory and swap space utilization, CPU utilization, kernel activities, and TTY statistics, among others. Both UP and SMP machines are fully supported.
		+
		+	==Example usage==
		+	* CPU usage for all CPU cores on your machine
		+
		+	This gives the cumulative real-time CPU usage of all CPUs on your machine. "<code>1 3</code>" reports for every 1 seconds a total of 3 times. The most useful column/field in this report is "<code>%idle</code>" for the CPU load:
		+	<pre>
		+	$ sar -u 1 3
		+	Linux 3.8.0-30 (foobar) 11/09/13 _x86_64_ (4 CPU)
		+
		+	17:12:06 CPU %user %nice %system %iowait %steal %idle
		+	17:12:07 all 7.93 0.00 4.35 0.00 0.26 87.47
		+	17:12:08 all 13.04 0.00 4.35 0.00 0.51 82.10
		+	17:12:09 all 11.70 0.00 4.83 0.00 0.00 83.46
		+	Average: all 10.89 0.00 4.51 0.00 0.26 84.34
		+	</pre>
		+
		+	* CPU usage for all CPU core on your machine with extended output:
		+	<pre>
		+	$ sar -u ALL 1 3
		+	Linux 3.8.0-30 (foobar) 11/09/13 _x86_64_ (4 CPU)
		+
		+	17:16:04 CPU %usr %nice %sys %iowait %steal %irq %soft %guest %idle
		+	17:16:05 all 7.87 0.00 3.30 0.00 0.25 0.00 0.00 0.00 88.58
		+	17:16:06 all 7.75 0.00 3.88 0.00 0.26 0.00 0.00 0.00 88.11
		+	17:16:07 all 8.46 0.00 4.87 0.00 0.26 0.00 0.00 0.00 86.41
		+	Average: all 8.03 0.00 4.01 0.00 0.26 0.00 0.00 0.00 87.70
		+	</pre>
		+
		+	* CPU usage for second day of the month (Note: On some distros, the location of the <code>`sar`</code> logs is stored under <code>/var/log/sa/</code>):
		+	sar -u -f /var/log/sysstat/sa02

	==External links==		==External links==

@@ Line 97: / Line 97: @@
 ==External links==
 * [http://pagesperso-orange.fr/sebastien.godard/ Official website]
-* [http://www.rackspace.com/knowledge_center/article/monitoring-network-traffic Monitoring Network Traffic] &mdash; examples of how to install and use `iptraf` and `vnstat` on various Linux distro.
+* [http://www.rackspace.com/knowledge_center/article/monitoring-network-traffic Monitoring Network Traffic] &mdash; examples of how to install and use `iptraf` and `vnstat` on various Linux distros.
 [[Category:Linux Command Line Tools]]