[CentOS] Increase CPU usage on HV after upgrade (7.2 -> 7.3)

Wed Jan 18 13:54:15 UTC 2017
Gianluca Cecchi <gianluca.cecchi at gmail.com>

On Wed, Jan 18, 2017 at 2:34 PM, Subscriber <ml-lists at agoris.net.ua> wrote:

> Hello ,
> After upgrading the system from CentOS 7.2.1511 to CenOS 7.3.1611 I
> see that the average processing time has increased from 5-7% to 12-15%
> (doubled). Not critical but it is not pleasant. Server as KVM with 5
> virtual machines. Someone noticed something similar? If so, how to fix
> that?
> Thx.
In the mean time, if you have not disabled it, you should find some
collected statistics from sysstat/sar.
Look at the sarXX files under /var/log/sa. They should be kept for 30 day
by default in CentOS 7.
So you can compare cpu, mem, I/O profiles before and after the upgrade.
If you have access to Red Hat documents you can look also here:

or in general some articles like this:
and to create pdf graphics with kSar