`sar` command

Josh — Thu, 04 Sep 2008 12:34:52 +0000

I’m always trying to find a good method of monitoring system performance and logging it, but today I ran into a rather strange issue that I couldn’t find on google.

sar 0 was returning high idle percentages:

# sar -u 0

08:17:29 AM �  �  �  CPU �  �  %user �  �  %nice �  %system �  %iowait �  �  %idle

08:17:29 AM �  �  �  all �  �  18.11 �  �  � 0.01 �  �  11.66 �  �  70.22 �  � 3549.42
running top didn't produce 3.5k % idle and in fact the system was nearly 98% idle.� 
The quick fix is to simply run

yum update sysstat
That fixed the problem immediately on the box I was using.

Hope this helps someone else.

BlueScripts » sar

`sar` command