Sep 4, 2008 - 1 minutes

sar command

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.Â
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.

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