You could use "mds_cache_size" to limit number of CAPS untill you have this fixed, but I'd say for your number of caps and inodes, 20GB is normal.
Regards,
this mds (jewel) here is consuming 24GB RAM:
{
"mds": {
"request": 7194867047,
"reply": 7194866688,
"reply_latency": {
"avgcount": 7194866688,
"sum": 27779142.611775008
},
"forward": 0,
"dir_fetch": 179223482,
"dir_commit": 1529387896,
"dir_split": 0,
"inode_max": 3000000,
"inodes": 3001264,
"inodes_top": 160517,
"inodes_bottom": 226577,
"inodes_pin_tail": 2614170,
"inodes_pinned": 2770689,
"inodes_expired": 2920014835,
"inodes_with_caps": 2743194,
"caps": 2803568,
"subtrees": 2,
"traverse": 8255083028,
"traverse_hit": 7452972311,
"traverse_forward": 0,
"traverse_discover": 0,
"traverse_dir_fetch": 180547123,
"traverse_remote_ino": 122257,
"traverse_lock": 5957156,
"load_cent": 18446743934203149911,
"q": 54,
"exported": 0,
"exported_inodes": 0,
"imported": 0,
"imported_inodes": 0
}
}
Webert Lima
DevOps Engineer at MAV Tecnologia
Belo Horizonte - Brasil
IRC NICK - WebertRLZ
On Fri, May 11, 2018 at 3:13 PM Alexandre DERUMIER <aderumier@xxxxxxxxx> wrote:
Hi,
I'm still seeing memory leak with 12.2.5.
seem to leak some MB each 5 minutes.
I'll try to resent some stats next weekend.
----- Mail original -----
De: "Patrick Donnelly" <pdonnell@xxxxxxxxxx>
À: "Brady Deetz" <bdeetz@xxxxxxxxx>
Cc: "Alexandre Derumier" <aderumier@xxxxxxxxx>, "ceph-users" <ceph-users@xxxxxxxxxxxxxx>
Envoyé: Jeudi 10 Mai 2018 21:11:19
Objet: Re: ceph mds memory usage 20GB : is it normal ?
On Thu, May 10, 2018 at 12:00 PM, Brady Deetz <bdeetz@xxxxxxxxx> wrote:
> [ceph-admin@mds0 ~]$ ps aux | grep ceph-mds
> ceph 1841 3.5 94.3 133703308 124425384 ? Ssl Apr04 1808:32
> /usr/bin/ceph-mds -f --cluster ceph --id mds0 --setuser ceph --setgroup ceph
>
>
> [ceph-admin@mds0 ~]$ sudo ceph daemon mds.mds0 cache status
> {
> "pool": {
> "items": 173261056,
> "bytes": 76504108600
> }
> }
>
> So, 80GB is my configured limit for the cache and it appears the mds is
> following that limit. But, the mds process is using over 100GB RAM in my
> 128GB host. I thought I was playing it safe by configuring at 80. What other
> things consume a lot of RAM for this process?
>
> Let me know if I need to create a new thread.
The cache size measurement is imprecise pre-12.2.5 [1]. You should upgrade ASAP.
[1] https://tracker.ceph.com/issues/22972
--
Patrick Donnelly
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