Possible reasons:
- MTU problems  - 30% possibility
- duplex problems - 50% possibility
- other - 20% possibility


It is unlikely that NFS is a primary root cause of the problem.

Try small buffer size in NFS, then big biffer size, and try ftp (just to
compare). RUn ethereal, write out protocll and see if there are repeats,
delays and so on. Disable NFSv4 and try again.

----- Original Message -----
From: "Michael Taylor" <mdtaylor69@(protected)>
To: "Arun Singh" <Arun.Singh@(protected)>
Sent: Wednesday, May 02, 2007 2:42 PM
Subject: [suse-oracle] Poor NFS read/write performance on OpenSuse 10.2


I know OpenSuse 10.2 is not enterprise software, but I have been running
Suse on my Thinkpad since 9.1 days and prefer having the mobility and
desktop packages available.

I have several NFS shares mounted with the typical oracle NFS options
(rsize=32768,wsize=32768,hard,actimeo=0), and performance has always been
terrific. After upgrading to OpenSuse 10.2 (building fresh after a hard
drive failure), any actions over NFS are terrible. My 2 hour backup now
takes 7 hours, the system locks ups for 5-10 minutes while reading or
writing over NFS. I cannot watch any movies over NFS anymore without the
system freezing.

Any idea what changed NFS wise between 10.1 and 10.2? Are there any
additional mount options I should use to get back to the pre 10.2 NFS
performance? The firewall is configured to allow NFS Server on the host and
NFS Client on the client.

Thanks,
-Michael


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