Hello Alexandre,
On Thu, Mar 22, 2018 at 2:29 AM, Alexandre DERUMIER <[email protected]> wrote:
> Hi,
>
> I'm running cephfs since 2 months now,
>
> and my active msd memory usage is around 20G now (still growing).
>
> ceph 1521539 10.8 31.2 20929836 20534868 ? Ssl janv.26 8573:34
> /usr/bin/ceph-mds -f --cluster ceph --id 2 --setuser ceph --setgroup ceph
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
>
>
> this is on luminous 12.2.2
>
> only tuning done is:
>
> mds_cache_memory_limit = 5368709120
>
>
> (5GB). I known it's a soft limit, but 20G seem quite huge vs 5GB ....
>
>
> Is it normal ?
No, that's definitely not normal!
> # ceph daemon mds.2 perf dump mds
> {
> "mds": {
> "request": 1444009197,
> "reply": 1443999870,
> "reply_latency": {
> "avgcount": 1443999870,
> "sum": 1657849.656122933,
> "avgtime": 0.001148095
> },
> "forward": 0,
> "dir_fetch": 51740910,
> "dir_commit": 9069568,
> "dir_split": 64367,
> "dir_merge": 58016,
> "inode_max": 2147483647,
> "inodes": 2042975,
> "inodes_top": 152783,
> "inodes_bottom": 138781,
> "inodes_pin_tail": 1751411,
> "inodes_pinned": 1824714,
> "inodes_expired": 7258145573,
> "inodes_with_caps": 1812018,
> "caps": 2538233,
> "subtrees": 2,
> "traverse": 1591668547,
> "traverse_hit": 1259482170,
> "traverse_forward": 0,
> "traverse_discover": 0,
> "traverse_dir_fetch": 30827836,
> "traverse_remote_ino": 7510,
> "traverse_lock": 86236,
> "load_cent": 144401980319,
> "q": 49,
> "exported": 0,
> "exported_inodes": 0,
> "imported": 0,
> "imported_inodes": 0
> }
> }
Can you also share `ceph daemon mds.2 cache status`, the full `ceph
daemon mds.2 perf dump`, and `ceph status`?
Note [1] will be in 12.2.5 and may help with your issue.
[1] https://github.com/ceph/ceph/pull/20527
--
Patrick Donnelly
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