Hi Erich,
Thanks for your logs, and it should be the same issue with
https://tracker.ceph.com/issues/62052, could you try to test with this
fix again ?
Please let me know if you still could see this bug then it should be the
locker order bug as https://tracker.ceph.com/issues/62123.
Thanks
- Xiubo
On 3/28/24 04:03, Erich Weiler wrote:
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
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