Ok case close, I found the solution :
1- Connect on the active mgr
2- Show config
#ceph daemon mgr.`hostname -s` config show | grep mon_pg_warn_max_object_skew
"mon_pg_warn_max_object_skew": "10.000000",
3- Change the value
#ceph config set mgr.`hostname -s` mon_pg_warn_max_object_skew 20
4- Confirm the change
#ceph daemon mgr.`hostname -s` config show | grep mon_pg_warn_max_object_skew
"mon_pg_warn_max_object_skew": "20.000000",
5- Result
#ceph health detail
HEALTH_OK
Sylvain
-----Message d'origine-----
De : St-Germain, Sylvain (SSC/SPC)
Envoyé : 23 janvier 2020 07:55
À : 'ceph-users@xxxxxxx' <ceph-users@xxxxxxx>
Objet : Problem : "1 pools have many more objects per pg than average"
///////////////////////// Problem ///////////////////////////
I've got a Warning on my cluster that I cannot remove :
"1 pools have many more objects per pg than average"
Does somebody has some insight ? I think it's normal to have this warning because I have just one pool in use, but how can I remove this warning ?
Thx !
///////////////////////// INFORMATION ///////////////////////////
*** Here's some information about the cluster
# ceph health detail
HEALTH_WARN 1 pools have many more objects per pg than average MANY_OBJECTS_PER_PG 1 pools have many more objects per pg than average
pool default.rgw.buckets.data objects per pg (50567) is more than 14.1249 times cluster average (3580)
# sudo ceph-conf -D | grep mon_pg_warn_max_object_skew mon_pg_warn_max_object_skew = 10.000000
# ceph daemon mon.dao-wkr-04 config show | grep mon_pg_warn_max_object_skew
"mon_pg_warn_max_object_skew": "10.000000"
# ceph -v
ceph version 14.2.4 (75f4de193b3ea58512f204623e6c5a16e6c1e1ba) nautilus (stable)
# ceph df
RAW STORAGE:
CLASS SIZE AVAIL USED RAW USED %RAW USED
hdd 873 TiB 823 TiB 50 TiB 51 TiB 5.80
TOTAL 873 TiB 823 TiB 50 TiB 51 TiB 5.80
POOLS:
POOL ID STORED OBJECTS USED %USED MAX AVAIL
.rgw.root 11 3.5 KiB 8 1.5 MiB 0 249 TiB
default.rgw.control 12 0 B 8 0 B 0 249 TiB
default.rgw.meta 13 52 KiB 186 34 MiB 0 249 TiB
default.rgw.log 14 0 B 207 0 B 0 249 TiB
default.rgw.buckets.index 15 1.2 GiB 131 1.2 GiB 0 249 TiB
cephfs_data 29 915 MiB 202 1.5 GiB 0 467 TiB
cephfs_metadata 30 145 KiB 23 2.1 MiB 0 249 TiB
default.rgw.buckets.data 31 30 TiB 12.95M 50 TiB 6.32 467 TiB
# ceph osd dump | grep default.rgw.buckets.data pool 31 'default.rgw.buckets.data' erasure size 8 min_size 6 crush_rule 2 object_hash rjenkins pg_num 256 pgp_num 256 autoscale_mode on last_change 9502 lfor 0/2191/7577 flags hashpspool stripe_width 20480 target_size_ratio 0.4 application rgw
/////////////////////////// SOLUTION TRIED ///////////////////////////
1- I try to increase the value of mon_pg_warn_max_object_skew parameter
#sudo ceph tell mon.* injectargs '--mon_pg_warn_max_object_skew 20'
#sudo ceph tell osd.* injectargs '--mon_pg_warn_max_object_skew 20'
+ And reboot the monitor
The parameter didn't change.
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