Re: High CPU load, but nothing consuming it...
On 02/18/2016 05:31 PM, Erick Ocrospoma wrote:
> 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 ?
>
>
>
Hi and thank you for your answer.
Here are network graphs for the period :
http://oi67.tinypic.com/macbvp.jpg & http://oi67.tinypic.com/2h7i15j.jpg
Network is not included in I/O ? As you can see there is no extra load
on network at this specific time...
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