Re: slow requests and high i/o / read rate on bluestore osds after upgrade 12.2.8 -> 12.2.10

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Hello list,

i also tested current upstream/luminous branch and it happens as well. A
clean install works fine. It only happens on upgraded bluestore osds.

Greets,
Stefan

Am 14.01.19 um 20:35 schrieb Stefan Priebe - Profihost AG:
> while trying to upgrade a cluster from 12.2.8 to 12.2.10 i'm experience
> issues with bluestore osds - so i canceled the upgrade and all bluestore
> osds are stopped now.
> 
> After starting a bluestore osd i'm seeing a lot of slow requests caused
> by very high read rates.
> 
> 
> Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s
> avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
> sda              45,00   187,00  767,00   39,00 482040,00  8660,00
> 1217,62    58,16   74,60   73,85   89,23   1,24 100,00
> 
> it reads permanently with 500MB/s from the disk and can't service client
> requests. Overall client read rate is at 10.9MiB/s rd
> 
> I can't reproduce this with 12.2.8. Is this a known bug / regression?
> 
> Greets,
> Stefan
> 
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