Trond Myklebust wrote:
> On Thu, 2007-12-13 at 17:07 -0700, Orion Poplawski wrote:
>> Trond Myklebust wrote:
>>> Have you tried increasing the value
>>> in /proc/sys/fs/nfs/nfs_congestion_kb ?
>> Well, I just came across this message while trying to improve NFS
>> performance locally. On my F8 client, it is set to 30400 by default.
>> Changing to 60800 kills performance. Writes go from ~20MB/s to ~5MB/s,
>> reads from ~80MB/s to ~47MB/s as measured by bonnie++.
>>
>> Expected?
>
> UDP? If so, then possibly yes. UDP has lousy congestion control, so if
> the server gets too busy to respond, then performance dies.
Nope, TCP. w/rsize is 32k. Server is pretty lightly loaded. Server is
RHEL4.5.
--
Orion Poplawski
Technical Manager 303-415-9701 x222
NWRA/CoRA Division FAX: 303-415-9702
3380 Mitchell Lane [email protected]
Boulder, CO 80301 http://www.cora.nwra.com