Hi folks,
A question about memory usage by the Mon. I have a cluster that is
being used exclusively for RBD (no CephFS/mds). I have 5 mons, and
one is slowly but surely using a heck of a lot more memory than the
others:
# for x in ceph{1..5}; do ssh $x 'ps aux | grep ceph-mon | grep -v grep'; done
root 31034 5.2 0.1 312116 75516 ? Ssl Feb14 881:51
/usr/bin/ceph-mon -i a --pid-file /var/run/ceph/mon.a.pid -c
/etc/ceph/ceph.conf
root 29361 4.8 53.9 22526128 22238080 ? Ssl Feb14 822:36
/usr/bin/ceph-mon -i b --pid-file /var/run/ceph/mon.b.pid -c
/tmp/ceph.conf.31144
root 28421 7.0 0.1 273608 88608 ? Ssl Feb20 516:48
/usr/bin/ceph-mon -i c --pid-file /var/run/ceph/mon.c.pid -c
/tmp/ceph.conf.10625
root 25876 4.8 0.1 240752 84048 ? Ssl Feb14 816:54
/usr/bin/ceph-mon -i d --pid-file /var/run/ceph/mon.d.pid -c
/tmp/ceph.conf.31537
root 24505 4.8 0.1 228720 79284 ? Ssl Feb14 818:14
/usr/bin/ceph-mon -i e --pid-file /var/run/ceph/mon.e.pid -c
/tmp/ceph.conf.31734
As you can see, one is up over 20GB, while the others are < 100MB.
Is this normal? The box has plenty of RAM -- I'm wondering if this is
a memory leak, or if it's just slowly finding more things it can cache
and such.
Thanks,
- Travis
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