Hi Igor and David,
Thanks for your replies. There are no ceph-mds processes running in our
cluster.
I'm guesing David's reply applies to us, and we just need to setup
additional monitoring for memory usage, so we get notified in case it
happens again.
Anyway: we learned that this can happen, so next time we know where to
look first.
Thanks both, for you replies,
MJ
On 11/04/2016 03:26 PM, Igor.Podoski@xxxxxxxxxxxxxx wrote:
Maybe you hit this https://github.com/ceph/ceph/pull/10238 still waits for merge.
This will occur only if you have ceph-mds process in your cluster, but it's not configured (you not need to use MDS, this process could be running only on some node).
Check your monitor logs for something like: "up but filesystem disabled" and how many similar lines you have.
Regards,
Igor.
-----Original Message-----
From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of
mj
Sent: Friday, November 4, 2016 2:06 PM
To: ceph-users@xxxxxxxxxxxxxx
Subject: suddenly high memory usage for ceph-mon process
Hi,
Running ceph 0.94.9 on jessie (proxmox), three hosts, 4 OSDs per host, ssd
journal, 10G cluster network. Hosts have 65G ram. The cluster is generally not
very buzy.
Suddenly we were getting HEALTH_WRN today, with two osd's (both on the
same server) being slow. Looking into this, we noticed very high memory
usage on that host: 75% memory for ceph-mon!
(normally here ceph-mon uses around 1% - 2%)
I restarted ceph-mon on that host, and that seems to have brought things
back to normal immediately.
I don't see anything out of the ordinary in /var/log/syslog on that server, and
also generally the cluster is HEALTH_OK. No changes to configs lately (last
many weeks) and last time I applied updates and rebooted is 30 days ago.
No idea what could have caused this. Any ideas what to check, where to
look? What would typically cause such high memory usage for the ceph-mon
process?
MJ
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