[CentOS-virt] KVM

Alvin Starr alvin at netvel.net
Mon Feb 8 19:30:26 UTC 2016


Slow disks will show up as higher I/Owait times.
If your seeing 99% cpu usage then your likely looking at some other problem.

If you run top what are you seeing on the %Cpu(s) line?

On 02/08/2016 02:20 PM, Gokan Atmaca wrote:
>> I'm guessing you're using standard 7,200rpm platter drives? You'll need
>> to share more information about your environment in order for us to
>> provide useful feedback. Usually though, the answer is 'caching' and/or
>> 'faster disks'.
> Yes , 7.2k rpm disks. 2T mirror (soft). In fact, I had such a
> preference for slightly more capacity.
> Unfortunately very expensive SAS drives.  But this works only if the
> server in question occur.
> In this case, about 15 minutes. progress.
>
>
> On Mon, Feb 8, 2016 at 9:13 PM, Digimer <lists at alteeve.ca> wrote:
>> On 08/02/16 02:12 PM, Gokan Atmaca wrote:
>>> Hello
>>>
>>> I use KVM. In a virtual machine "jbd2 dm-0" disk I / O is very
>>> increases. It consumes up to 99%. For this reason, slowing down the
>>> other virtual machine. What should I do to solve the problem. ?
>>>
>>> Thanks..
>> I'm guessing you're using standard 7,200rpm platter drives? You'll need
>> to share more information about your environment in order for us to
>> provide useful feedback. Usually though, the answer is 'caching' and/or
>> 'faster disks'.
>>
>> --
>> Digimer
>> Papers and Projects: https://alteeve.ca/w/
>> What if the cure for cancer is trapped in the mind of a person without
>> access to education?
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Alvin Starr                   ||   voice: (905)513-7688
Netvel Inc.                   ||   Cell:  (416)806-0133
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