Hi, our cluster is on Octopus 15.2.4. We noticed that our MON all ran out of space yesterday because the store.db folder kept growing until it filled up the filesystem. We added more space to the MON nodes but store.db keeps growing. Right now it's ~220GiB on the two MON nodes that are active. We shut down on MON node when it hit ~98GiB and it seems that it trimmed its local store.db down to 102MiB and now also keeps growing again. Checking the keys in store.db while the MON is offline shows a lot of "logm" and "osdmap" keys: ceph-monstore-tool <path> dump-keys|awk '{print $1}'|uniq -c 86 auth 2 config 11 health 275929 logm 55 mds_health 1 mds_metadata 602 mdsmap 599 mgr 1 mgr_command_descs 3 mgr_metadata 209 mgrstat 461 mon_config_key 1 mon_sync 7 monitor 1 monitor_store 7 monmap 454 osd_metadata 1 osd_pg_creating 4804 osd_snap 138366 osdmap 538 paxos 5 pgmap I already tried compacting it with "ceph tell ..." and "ceph-monstore-tool <path> compact" but it stayed the same size. Also copying it with "ceph-monstore-tool <path> store-copy <new-path>" just created a copy of the same size. Out cluster is currently in WARN status because we are low on space and several OSDs are in a backfill_full state. Could this be related? Regards, Michael