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

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This is not the case with 12.2.8 - it happens with 12.2.9 as well. After
boot all pgs are instantly active - not inactive pgs at least not
noticable in ceph -s.

With 12.2.9 or 12.2.10 or eben current upstream/luminous it takes
minutes until all pgs are active again.

Greets,
Stefan
Am 16.01.19 um 15:22 schrieb Stefan Priebe - Profihost AG:
> Hello,
> 
> while digging into this further i saw that it takes ages until all pgs
> are active. After starting the OSD 3% of all pgs are inactive and it
> takes minutes after they're active.
> 
> The log of the OSD is full of:
> 
> 
> 2019-01-16 15:19:13.568527 7fecbf7da700  0 osd.33 pg_epoch: 1318479
> pg[5.563( v 1318474'61584855 lc 1318356'61576253 (1318287'615747
> 21,1318474'61584855] local-lis/les=1318472/1318473 n=1912
> ec=133405/133405 lis/c 1318472/1278145 les/c/f 1318473/1278148/1211861 131
> 8472/1318472/1318472) [33,3,22] r=0 lpr=1318472 pi=[1278145,1318472)/1
> rops=4 crt=1318474'61584855 mlcod 1318356'61576253 active+rec
> overing+degraded m=184 snaptrimq=[ec1a0~1,ec808~1]
> mbc={255={(2+0)=185,(3+0)=2}}] _update_calc_stats ml 185 upset size 3 up 2
> 2019-01-16 15:19:13.568637 7fecbf7da700  0 osd.33 pg_epoch: 1318479
> pg[5.563( v 1318474'61584855 lc 1318356'61576253 (1318287'615747
> 21,1318474'61584855] local-lis/les=1318472/1318473 n=1912
> ec=133405/133405 lis/c 1318472/1278145 les/c/f 1318473/1278148/1211861 131
> 8472/1318472/1318472) [33,3,22] r=0 lpr=1318472 pi=[1278145,1318472)/1
> rops=4 crt=1318474'61584855 mlcod 1318356'61576253 active+rec
> overing+degraded m=184 snaptrimq=[ec1a0~1,ec808~1]
> mbc={255={(2+0)=185,(3+0)=2}}] _update_calc_stats ml 2 upset size 3 up 3
> 2019-01-16 15:19:15.909327 7fecbf7da700  0 osd.33 pg_epoch: 1318479
> pg[5.563( v 1318474'61584855 lc 1318356'61576253 (1318287'615747
> 21,1318474'61584855] local-lis/les=1318472/1318473 n=1912
> ec=133405/133405 lis/c 1318472/1278145 les/c/f 1318473/1278148/1211861 131
> 8472/1318472/1318472) [33,3,22] r=0 lpr=1318472 pi=[1278145,1318472)/1
> rops=4 crt=1318474'61584855 mlcod 1318356'61576253 active+rec
> overing+degraded m=183 snaptrimq=[ec1a0~1,ec808~1]
> mbc={255={(2+0)=184,(3+0)=3}}] _update_calc_stats ml 184 upset size 3 up 2
> 2019-01-16 15:19:15.909446 7fecbf7da700  0 osd.33 pg_epoch: 1318479
> pg[5.563( v 1318474'61584855 lc 1318356'61576253 (1318287'615747
> 21,1318474'61584855] local-lis/les=1318472/1318473 n=1912
> ec=133405/133405 lis/c 1318472/1278145 les/c/f 1318473/1278148/1211861 131
> 8472/1318472/1318472) [33,3,22] r=0 lpr=1318472 pi=[1278145,1318472)/1
> rops=4 crt=1318474'61584855 mlcod 1318356'61576253 active+rec
> overing+degraded m=183 snaptrimq=[ec1a0~1,ec808~1]
> mbc={255={(2+0)=184,(3+0)=3}}] _update_calc_stats ml 3 upset size 3 up 3
> 2019-01-16 15:19:23.503231 7fecb97ff700  0 osd.33 pg_epoch: 1318479
> pg[5.563( v 1318474'61584855 lc 1318356'61576253 (1318287'615747
> 21,1318474'61584855] local-lis/les=1318472/1318473 n=1912
> ec=133405/133405 lis/c 1318472/1278145 les/c/f 1318473/1278148/1211861 131
> 8472/1318472/1318472) [33,3,22] r=0 lpr=1318472 pi=[1278145,1318472)/1
> rops=4 crt=1318474'61584855 mlcod 1318356'61576253 active+rec
> overing+degraded m=183 snaptrimq=[ec1a0~1,ec808~1]
> mbc={255={(2+0)=183,(3+0)=3}}] _update_calc_stats ml 183 upset size 3 up 2
> 
> Greets,
> Stefan
> Am 16.01.19 um 09:12 schrieb Stefan Priebe - Profihost AG:
>> Hi,
>>
>> no ok it was not. Bug still present. It was only working because the
>> osdmap was so far away that it has started backfill instead of recovery.
>>
>> So it happens only in the recovery case.
>>
>> Greets,
>> Stefan
>>
>> Am 15.01.19 um 16:02 schrieb Stefan Priebe - Profihost AG:
>>>
>>> Am 15.01.19 um 12:45 schrieb Marc Roos:
>>>>  
>>>> I upgraded this weekend from 12.2.8 to 12.2.10 without such issues 
>>>> (osd's are idle)
>>>
>>>
>>> it turns out this was a kernel bug. Updating to a newer kernel - has
>>> solved this issue.
>>>
>>> Greets,
>>> Stefan
>>>
>>>
>>>> -----Original Message-----
>>>> From: Stefan Priebe - Profihost AG [mailto:s.priebe@xxxxxxxxxxxx] 
>>>> Sent: 15 January 2019 10:26
>>>> To: ceph-users@xxxxxxxxxxxxxx
>>>> Cc: n.fahldieck@xxxxxxxxxxxx
>>>> Subject: Re:  slow requests and high i/o / read rate on 
>>>> bluestore osds after upgrade 12.2.8 -> 12.2.10
>>>>
>>>> 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
>>>>>
>>>> _______________________________________________
>>>> ceph-users mailing list
>>>> ceph-users@xxxxxxxxxxxxxx
>>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>>>
>>>>
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