[Gluster-users] Old story - glusterfs memory usage
ao at m-privacy.de
Fri Mar 26 12:16:53 UTC 2010
On Friday 26 March 2010 wrote Krzysztof Strasburger:
> On Fri, Mar 26, 2010 at 12:08:48PM +0100, Amon Ott wrote:
> > I can confirm this problem on our test system. glusterfs goes up to the
> > memory limit set for performance/io-cache (1.2 GB here), logs out of
> > memory errors and further access fails with "Stale NFS file handle". The
> > above command did not help, only remounting did.
> > So I assume some memory leak in the io-cache filter.
> No, this should happen without any filters. What happens, if you disable
Disabled both io-cache and read-ahead. Now it only grew to 739 MB. Again,
drop_caches did not reduce that size, although it reduced the fuse_inode
slabs significantly. No out of memory now.
My test is a backup run of some linux kernel source trees, so many small files
and dirs. Data is on four servers, distributed over two mirrors of two nodes
each. We would like to use glusterfs for distributed storage in a cluster of
application servers - but this bug is a show stopper, because it leads to
denial of service.
Please note that I can live with 1GB of memory for the glusterfs process, if
it needs that. It must not block accesses, this is my concern.
Dr. Amon Ott - m-privacy GmbH
Am Köllnischen Park 1, 10179 Berlin
Tel: +49 30 24342334
Fax: +49 30 24342336
Amtsgericht Charlottenburg HRB 84946
Dipl.-Kfm. Holger Maczkowsky,
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