[Gluster-users] Memory leak with glusterfs NFS on 3.2.6

Philip Poten philip.poten at gmail.com
Tue Jun 12 12:18:53 UTC 2012

2012/6/12 Dan Bretherton <d.a.bretherton at reading.ac.uk>:
> I wonder if this memory leak is the cause of the NFS performance degradation
> I reported in April.

That's probable, since the performance does go down for us too when
the glusterfs process reaches a large percentage of RAM. My initial
guess was that it's the file system cache that's being eradicated,
thus iowait increases. But a closer look at our munin graphs implies,
that it's also the user space that eats more and more CPU
proportionally with RAM:


There are two restarts of the whole gluster process family visible on
those graphs: one a week ago at the very beginning (white in the
memory graph, as munin couldn't fork all it needed), and one
yesterday. The drop between 8 and 9 was due to a problemv unrelated to

Pranith: I just made one dump, tomorrow I'll make one more and mail
them both to you so that you can compare them. While I just restarted
yesterday, the leak should be visible, as the process grows a few
hundred MB every day.

thanks for the fast reply,

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