Re: ceph threads and performance

[Paul Emmerich <paul.emmerich@xxxxxxxx>]

If there was an optimal setting, then it would be the default.

Also, both have these options have been removed in Luminous ~2 years ago

Paul

--
Paul Emmerich

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On Wed, Jun 12, 2019 at 3:51 PM tim taler <robur314@xxxxxxxxx> wrote:

I will look into that, but:
IS there a rule of thumb to determine the optimal setting for
osd disk threads
and
osd op threads
?
TIA

On Wed, Jun 12, 2019 at 3:22 PM Paul Emmerich <paul.emmerich@xxxxxxxx> wrote:
>
>
>
> On Wed, Jun 12, 2019 at 10:57 AM tim taler <robur314@xxxxxxxxx> wrote:
>>
>> We experience absurd slow i/o in the VMs and I suspect
>> our thread settings in ceph.conf to be one of the culprits.
>
>
> this is probably not the cause. But someone might be able to help you if you
> share details on your setup (hardware, software) and workload (iops, bandwidth, latency)
>
> Paul
>
> --
> Paul Emmerich
>
> Looking for help with your Ceph cluster? Contact us at https://croit.io
>
> croit GmbH
> Freseniusstr. 31h
> 81247 München
> www.croit.io
> Tel: +49 89 1896585 90
>
>>
>> Is there a rule of thumb how to get the proper setting?
>> What side effect will have a higher threads setting?
>> Higer cpu utilisation? higher memory impact?
>>
>> TIA
>> _______________________________________________
>> ceph-users mailing list
>> ceph-users@xxxxxxxxxxxxxx
>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

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