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Hi Arne,

thanks for your answer. I have to admit i screwed it up myself: i built 
a backup system this week and mixed up Cinder versions, in version 
11.0.1 the problem seems to be definitely fixed, no need for manual 
intervention.

matthias

Am 2017-11-17 um 15:16 schrieb Arne Wiebalck:
> Hi Matthias,
> 
> This may be https://bugs.launchpad.net/cinder/+bug/1704106.
> 
> In our deployment it was necessary to disable the the gathering of
> the provisioning stats and we simply commented it out:
> 
> #self._get_usage_info()
> 
> in def _update_volume_stats(self) from cinder/volume/drivers/rbd.py
> 
> 
> HTH,
>   Arne
> 
> 
>> On 17 Nov 2017, at 13:55, Matthias Leopold <matthias.leopold at meduniwien.ac.at> wrote:
>>
>> Hi,
>>
>> we are running a Cinder Pike instance with Ceph (luminous) backend for use with oVirt (not openstack). We are experiencing the "cinder-volume causes high CPU load" issue. In Cinder 11.0.0 we could successfully apply the fix mentioned in https://ask.openstack.org/en/question/110709/ocata-cinder-volume-causes-high-cpu-load-ceph-backend/. In Cinder 11.0.1 /usr/lib/python2.7/site-packages/cinder/volume/drivers/rbd.py changed, but the high CPU load problem reappeared. I tried changing "report_dynamic_total_capacity" (mentioned in the changelog), but it didn't make a difference. Has anyone seen/fixed this?
>>
>> thx
>> matthias
>>
>>
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> 
> --
> Arne Wiebalck
> CERN IT
> 

-- 
Matthias Leopold
IT Systems & Communications
Medizinische Universität Wien
Spitalgasse 23 / BT 88 /Ebene 00
A-1090 Wien
Tel: +43 1 40160-21241
Fax: +43 1 40160-921200