[ceph-users] what's meaning of "cache_hit_rate": 0.000000 in "ceph daemon mds. dump loads" output?

[Sang, Oliver]

hi all,

seek your help for this.
we are using luminous 12.2.12 and we enabled 3 active mds.
when I running "ceph daemon mds.<x> dump loads" on any active mds, I always saw 
such like below
    "mds_load": {
        "mds.0": {
            "request_rate": 526.045993,
            "cache_hit_rate": 0.000000,
...
        "mds.1": {
            "request_rate": 169.845956,
            "cache_hit_rate": 0.000000,
...
        "mds.2": {
            "request_rate": 300.511478,
            "cache_hit_rate": 0.000000,

don't understand what's this 'cache_hit_rate' and why it seems always 0?

we actually set a bigger mds_cache_memory_limit than default such like 16G in 
/etc/ceph/ceph.conf. are they related?

I checked https://docs.ceph.com/docs/luminous/cephfs/mds-config-ref/ , but 
didn't get further clue from the description of "mds cache *" settings.

_______________________________________________
ceph-users mailing list -- ceph-users@ceph.io
To unsubscribe send an email to ceph-users-le...@ceph.io