Hi, ceph status reports: root@ld3955:~# ceph -s   cluster:     id:     6b1b5117-6e08-4843-93d6-2da3cf8a6bae     health: HEALTH_ERR             1 filesystem is degraded             1 filesystem has a failed mds daemon             1 filesystem is offline             insufficient standby MDS daemons available             4 nearfull osd(s)             1 pool(s) nearfull             Reduced data availability: 59 pgs inactive, 16 pgs peering             Degraded data redundancy: 597/153910758 objects degraded (0.000%), 2 pgs degraded, 1 pg undersized             Degraded data redundancy (low space): 23 pgs backfill_toofull             1 pgs not deep-scrubbed in time             4 pgs not scrubbed in time             3 pools have too many placement groups             164 slow requests are blocked > 32 sec             1082 stuck requests are blocked > 4096 sec             1490 slow ops, oldest one blocked for 19711 sec, daemons [osd,0,osd,175,osd,186,osd,5,osd,6,osd,63,osd,68,osd,9,mon,ld5505,mon,ld5506]... have slow ops.   services:     mon: 3 daemons, quorum ld5505,ld5506,ld5507 (age 5h)     mgr: ld5507(active, since 5h), standbys: ld5506, ld5505     mds: pve_cephfs:0/1, 1 failed     osd: 419 osds: 416 up, 416 in; 6024 remapped pgs   data:     pools:   6 pools, 8864 pgs     objects: 51.30M objects, 196 TiB     usage:   594 TiB used, 907 TiB / 1.5 PiB avail     pgs:     0.666% pgs not active              597/153910758 objects degraded (0.000%)              52964415/153910758 objects misplaced (34.412%)              5954 active+remapped+backfill_wait              2786 active+clean              40   active+remapped+backfilling              35   activating              23   active+remapped+backfill_wait+backfill_toofull              16   peering              7    activating+remapped              1    activating+undersized+degraded              1    active+clean+scrubbing              1    active+recovering+degraded   io:     client:   3.5 KiB/s wr, 0 op/s rd, 0 op/s wr     recovery: 551 MiB/s, 137 objects/s I'm concerned about the slow ops on osd.0 and osd.9. On the relevant OSD node I can see 2 relevant services running for hours: ceph       14795       1 99 09:58 ?        08:49:22 /usr/bin/ceph-osd -f --cluster ceph --id 9 --setuser ceph --setgroup ceph ceph       15394       1 99 09:58 ?        07:10:00 /usr/bin/ceph-osd -f --cluster ceph --id 0 --setuser ceph --setgroup ceph In the relevant osd log I can find similar messages: root@ld5505:~# tail -f /var/log/ceph/ceph-osd.0.log 2019-10-08 15:35:32.830 7ff60c7cc700 -1 osd.0 233323 get_health_metrics reporting 236 slow ops, oldest is osd_pg_create(e233257 38.0:199987) 2019-10-08 15:35:33.806 7ff60c7cc700 -1 osd.0 233323 get_health_metrics reporting 236 slow ops, oldest is osd_pg_create(e233257 38.0:199987) 2019-10-08 15:35:34.842 7ff60c7cc700 -1 osd.0 233323 get_health_metrics reporting 236 slow ops, oldest is osd_pg_create(e233257 38.0:199987) 2019-10-08 15:35:35.862 7ff60c7cc700 -1 osd.0 233323 get_health_metrics reporting 236 slow ops, oldest is osd_pg_create(e233257 38.0:199987) root@ld5505:~# tail -f /var/log/ceph/ceph-osd.9.log 2019-10-08 15:35:38.822 7f8957599700 -1 osd.9 233407 get_health_metrics reporting 818 slow ops, oldest is osd_op(client.53385387.0:23 30.f7 30.bcc140f7 (undecoded) ondisk+retry+read+known_if_redirected e233362) 2019-10-08 15:35:39.854 7f8957599700 -1 osd.9 233407 get_health_metrics reporting 818 slow ops, oldest is osd_op(client.53385387.0:23 30.f7 30.bcc140f7 (undecoded) ondisk+retry+read+known_if_redirected e233362) 2019-10-08 15:35:40.850 7f8957599700 -1 osd.9 233407 get_health_metrics reporting 818 slow ops, oldest is osd_op(client.53385387.0:23 30.f7 30.bcc140f7 (undecoded) ondisk+retry+read+known_if_redirected e233362) 2019-10-08 15:35:41.862 7f8957599700 -1 osd.9 233407 get_health_metrics reporting 818 slow ops, oldest is osd_op(client.53385387.0:23 30.f7 30.bcc140f7 (undecoded) ondisk+retry+read+known_if_redirected e233362) Question: How can I analyse and solve the issue with slow ops? THX