Re: ceph osd commit latency increase over time, until restart

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Also I think it makes sense to create a ticket at this point. Any volunteers?

On 3/1/2019 1:00 AM, Igor Fedotov wrote:
Wondering if somebody would be able to apply simple patch that periodically resets StupidAllocator?

Just to verify/disprove the hypothesis it's allocator relateted

On 2/28/2019 11:57 PM, Stefan Kooman wrote:
Quoting Wido den Hollander (wido@xxxxxxxx):
Just wanted to chime in, I've seen this with Luminous+BlueStore+NVMe
OSDs as well. Over time their latency increased until we started to
notice I/O-wait inside VMs.
On a Luminous 12.2.8 cluster with only SSDs we also hit this issue I
guess. After restarting the OSD servers the latency would drop to normal
values again. See https://owncloud.kooman.org/s/BpkUc7YM79vhcDj

Reboots were finished at ~ 19:00.

Gr. Stefan

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