[ceph-users] MDS Behind on Trimming...

Hi All, I've been battling this for a while and I'm not sure where to go from here. I have a Ceph health warning as such: # ceph -s cluster: id: 58bde08a-d7ed-11ee-9098-506b4b4da440 health: HEALTH_WARN 1 MDSs report slow requests 1 MDSs behind on trimming services: mon: 5 daemons, quorum pr-md-01,pr-md-02,pr-store-01,pr-store-02,pr-md-03 (age 5d) mgr: pr-md-01.jemmdf(active, since 3w), standbys: pr-md-02.emffhz mds: 1/1 daemons up, 2 standby osd: 46 osds: 46 up (since 9h), 46 in (since 2w) data: volumes: 1/1 healthy pools: 4 pools, 1313 pgs objects: 260.72M objects, 466 TiB usage: 704 TiB used, 424 TiB / 1.1 PiB avail pgs: 1306 active+clean 4 active+clean+scrubbing+deep 3 active+clean+scrubbing io: client: 123 MiB/s rd, 75 MiB/s wr, 109 op/s rd, 1.40k op/s wr And the specifics are: # ceph health detail HEALTH_WARN 1 MDSs report slow requests; 1 MDSs behind on trimming [WRN] MDS_SLOW_REQUEST: 1 MDSs report slow requests mds.slugfs.pr-md-01.xdtppo(mds.0): 99 slow requests are blocked > 30 secs [WRN] MDS_TRIM: 1 MDSs behind on trimming mds.slugfs.pr-md-01.xdtppo(mds.0): Behind on trimming (13884/250) max_segments: 250, num_segments: 13884 That "num_segments" number slowly keeps increasing. I suspect I just need to tell the MDS servers to trim faster but after hours of googling around I just can't figure out the best way to do it. The best I could come up with was to decrease "mds_cache_trim_decay_rate" from 1.0 to .8 (to start), based on this page: https://www.suse.com/support/kb/doc/?id=000019740 But it doesn't seem to help, maybe I should decrease it further? I am guessing this must be a common issue...? I am running Reef on the MDS servers, but most clients are on Quincy. Thanks for any advice! cheers, erich