On Mon, Feb 24, 2020 at 2:28 PM Uday Bhaskar jalagam <jalagam.ceph@xxxxxxxxx> wrote: > > Thanks Patrick, > > is this the bug you are referring to https://tracker.ceph.com/issues/42515 ? Yes > We also see performance issues mainly on metadata operations like finding file stats operations , however mds perf dump shows no sign of any latencies . could this bug cause any performance issues ? Unlikely. > do you see any clue in this that could cause slow down in such operations ? our metadara pool has around 1.7 GB of data I gave mds cache 3 GB, 3GB cache is probably too small for your cluster. How many users? Your perf dump indicates it probably is 8GB and not 3GB. > I am not sure where to check how much used in the 3 GB or what is hit and miss count/ration in cache . "mds_co_bytes": 8160499164, in your perf dump. You can also look at inodes added/removed (to identify churn): "mds_mem": { "ino": 2740340, "ino+": 19461742, "ino-": 16721402, -- Patrick Donnelly, Ph.D. He / Him / His Senior Software Engineer Red Hat Sunnyvale, CA GPG: 19F28A586F808C2402351B93C3301A3E258DD79D _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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