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2016 Apr 08
0
Kernel 2.6.32-573.22.1.el6.x86_64, higher than usual load
...e calculated load
average was off by up to the number of CPUs in the machine. As a
consequence, job scheduling worked improperly causing a drop in the
system performance. This update keeps the delta of the CPU going into
NO_HZ idle separately, and folds the pending idle delta into the global
active countwhile correctly aging the averages for the idle-duration
when leaving NO_HZ mode. Now, job scheduling works correctly, ensuring
balanced CPU load. (BZ#1300349)"
From:
https://rhn.redhat.com/errata/RHSA-2016-0494.html
No idea if that is impacting the load shown on your machine .. maybe
someone has...
2016 Apr 08
2
Kernel 2.6.32-573.22.1.el6.x86_64, higher than usual load
Hi,
After switching to the 2.6.32-573.22.1.el6.x86_64 kernel (CentOS 6) a few weeks ago I have noticed that my servers are now reporting a much higher idle load.
The servers are being monitored with Zabbix, and there is a clear difference between the older kernel 2.6.32-573.12.1 and the newer 2.6.32-573.12.1.
I can see the problem on both physical and virtual servers.
You can see the Load