Re: High CPU load, but nothing consuming it...
Hi,
On 18 February 2016 at 10:26, Florent B <florent@coppint.com> wrote:
> Hi everyone,
>
> Today I have a little problem with a server on Jessie.
>
> It acts as a load balancer with IPVS+Keepalived.
>
> It is clustered with another server as failover, both servers have the
> same problem. Even if one of them is "slave", without charge.
>
> Sometime CPU load jump over 15 (1min average) and goes down to near zero
> a few minutes later. In the meantime, all CPU stats are "normal" (stable
> iowait, etc.).
>
> Here you can see my monitoring graphs for CPU Load :
> http://oi65.tinypic.com/kccu9.jpg
>
> And there for CPU utilization : http://oi66.tinypic.com/2w6sz9s.jpg
>
> You can see CPU is always idle...
>
> Both servers are virtualized with kvm last version.
>
> I have other servers like this, configured the same way, which does not
> have the problem.
>
> Does someone have an idea on how to explain this ?
>
> Thank you a lot.
>
> Florent
>
When I/O is high but cpu is not comsumed at all, it could be network
who is generating load. Do you have any network graph or stat ?
Erick.
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