Re: What's the NFS OOM problem?

[Willy Tarreau]

On Fri, Aug 11, 2006 at 10:33:32AM +1000, Neil Brown wrote:
> On Thursday August 10, w@xxxxxx wrote:
> > 
> > > Can someone help me and give me a brief description on OOM issue?
> > 
> > I don't know about any OOM issue related to NFS. At most it might happen
> > on the client (eg: stating firefox from an NFS root) which might not have
> > enough memory for new network buffers, but I don't even know if it's
> > possible at all.
> 
> We've had reports of OOM problems with NFS at SuSE.
> The common factors seem to be lots of memory (6G+) and very large
> files. 

Just out of curiosity, does it happen on 32bit or 64bit machines (or both) ?

> Tuning down  /proc/sys/vm/dirty_*ratio seems to avoid the problem,
> but I'm not very close to understanding what the real problem is.

The most important is to be aware of it ;-)

> NeilBrown

Thanks for the info,
Willy

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