Mon DB compaction MON_DISK_BIG

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Hi,


I've received a warning today morning:


HEALTH_WARN mons monserver-2c01,monserver-2c02,monserver-2c03 are using a lot of disk space
MON_DISK_BIG mons monserver-2c01,monserver-2c02,monserver-2c03 are using a lot of disk space
    mon.monserver-2c01 is 15.3GiB >= mon_data_size_warn (15GiB)
    mon.monserver-2c02 is 15.3GiB >= mon_data_size_warn (15GiB)
    mon.monserver-2c03 is 15.3GiB >= mon_data_size_warn (15GiB)

It hits the 15GB so I've restarted all the 3 mons, it triggered compaction.

I've also ran this command:

ceph tell mon.`hostname -s` compact on the first node, but it wents down only to 13GB.


du -sch /var/lib/ceph/mon/ceph-monserver-2c01/store.db/
13G     /var/lib/ceph/mon/ceph-monserver-2c01/store.db/
13G     total


Anything else I can do to reduce it?


Luminous 12.2.8 is the version.


Thank you in advance.


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