Difference between revisions of "Sar"
From Linuxintro
imported>ThorstenStaerk |
|||
| (4 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
sar allows you to monitor your computer resources' usage over a time frame. | sar allows you to monitor your computer resources' usage over a time frame. | ||
| + | |||
| + | = Use it = | ||
| + | To install and use sar [[find out your distribution]] and proceed accordingly: | ||
| + | |||
| + | == Ubuntu 10.04 == | ||
| + | * to install, [[open a console]] and enter | ||
| + | sudo apt-get install sysstat | ||
| + | /etc/init.d/sysstat start | ||
| + | * after a day you will find statistics in /var/log/sysstat. You can look at these using [[kSar]]. | ||
= Examples = | = Examples = | ||
| Line 36: | Line 45: | ||
05:23:29 AM eth3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 | 05:23:29 AM eth3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 | ||
</pre> | </pre> | ||
| + | |||
| + | = TroubleShooting = | ||
| + | If you get | ||
| + | # sar -q | ||
| + | Cannot open /var/log/sa/sa29: No such file or directory | ||
| + | Please check if data collecting is enabled | ||
| + | Just run | ||
| + | /usr/lib64/sa/sa1 | ||
= See also = | = See also = | ||
| − | * [[ksar]] | + | * [[ksar]] - how to turn the results into graphs |
| + | * [http://www.trickytools.com/php/sar2rrd.php sar2rrd] - how to turn the results into graphs | ||
* [[vmstat]] | * [[vmstat]] | ||
* [[iostat]] | * [[iostat]] | ||
* [[top]] | * [[top]] | ||
* [[diagnostics]] | * [[diagnostics]] | ||
Latest revision as of 18:06, 29 October 2015
sar allows you to monitor your computer resources' usage over a time frame.
Contents
Use it
To install and use sar find out your distribution and proceed accordingly:
Ubuntu 10.04
- to install, open a console and enter
sudo apt-get install sysstat /etc/init.d/sysstat start
- after a day you will find statistics in /var/log/sysstat. You can look at these using kSar.
Examples
CPU statistics
tweedleburg:~ # sar 10 Linux 2.6.32.12-0.7-default (tweedleburg) 12/05/2010 _x86_64_ 05:05:02 AM CPU %user %nice %system %iowait %steal %idle 05:05:12 AM all 7.16 0.00 0.79 0.00 0.00 92.04 05:05:22 AM all 7.05 0.00 0.77 0.02 0.00 92.16
network and ram
The following collects data for RAM (-r) and network (-n) all 10 seconds
tweedleburg:~ # sar -r -n DEV 10 Linux 2.6.32.12-0.7-default (tweedleburg) 12/05/2010 _x86_64_ 05:23:09 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit 05:23:19 AM 42832588 6586776 13.33 284956 3922980 1816792 3.68 05:23:09 AM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s 05:23:19 AM lo 1.51 1.51 0.18 0.18 0.00 0.00 0.00 05:23:19 AM eth0 37.10 1.71 3.51 0.25 0.00 0.00 0.00 05:23:19 AM eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 05:23:19 AM eth2 24.70 17.94 3.59 2.80 0.00 0.00 0.10 05:23:19 AM eth3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 05:23:19 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit 05:23:29 AM 42828780 6590584 13.34 284964 3922980 1820588 3.68 05:23:19 AM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s 05:23:29 AM lo 2.05 2.05 0.21 0.21 0.00 0.00 0.00 05:23:29 AM eth0 40.02 6.46 3.87 6.09 0.00 0.00 0.00 05:23:29 AM eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 05:23:29 AM eth2 17.03 9.78 2.14 1.53 0.00 0.00 0.10 05:23:29 AM eth3 0.00 0.00 0.00 0.00 0.00 0.00 0.00
TroubleShooting
If you get
# sar -q Cannot open /var/log/sa/sa29: No such file or directory Please check if data collecting is enabled
Just run
/usr/lib64/sa/sa1
