[ceph-users] Slow OPS

Brad Hubbard bhubbard at redhat.com
Wed Mar 20 17:23:16 PDT 2019


On Thu, Mar 21, 2019 at 12:11 AM Glen Baars <glen at onsitecomputers.com.au> wrote:
>
> Hello Ceph Users,
>
>
>
> Does anyone know what the flag point ‘Started’ is? Is that ceph osd daemon waiting on the disk subsystem?

This is set by "mark_started()" and is roughly set when the pg starts
processing the op. Might want to capture dump_historic_ops output
after the op completes.

>
>
>
> Ceph 13.2.4 on centos 7.5
>
>
>
>             "description": "osd_op(client.1411875.0:422573570 5.18ds0 5:b1ed18e5:::rbd_data.6.cf7f46b8b4567.000000000046e41a:head [read
>
> 1703936~16384] snapc 0=[] ondisk+read+known_if_redirected e30622)",
>
>             "initiated_at": "2019-03-21 01:04:40.598438",
>
>             "age": 11.340626,
>
>             "duration": 11.342846,
>
>             "type_data": {
>
>                 "flag_point": "started",
>
>                 "client_info": {
>
>                     "client": "client.1411875",
>
>                     "client_addr": "10.4.37.45:0/627562602",
>
>                     "tid": 422573570
>
>                 },
>
>                 "events": [
>
>                     {
>
>                         "time": "2019-03-21 01:04:40.598438",
>
>                         "event": "initiated"
>
>                     },
>
>                     {
>
>                         "time": "2019-03-21 01:04:40.598438",
>
>                         "event": "header_read"
>
>                     },
>
>                     {
>
>                         "time": "2019-03-21 01:04:40.598439",
>
>                         "event": "throttled"
>
>                     },
>
>                     {
>
>                         "time": "2019-03-21 01:04:40.598450",
>
>                         "event": "all_read"
>
>                     },
>
>                     {
>
>                         "time": "2019-03-21 01:04:40.598499",
>
>                         "event": "dispatched"
>
>                     },
>
>                     {
>
>                         "time": "2019-03-21 01:04:40.598504",
>
>                         "event": "queued_for_pg"
>
>                     },
>
>                     {
>
>                         "time": "2019-03-21 01:04:40.598883",
>
>                         "event": "reached_pg"
>
>                     },
>
>                     {
>
>                         "time": "2019-03-21 01:04:40.598905",
>
>                         "event": "started"
>
>                     }
>
>                 ]
>
>             }
>
>         }
>
>     ],
>
>
>
> Glen
>
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-- 
Cheers,
Brad


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