DirectNFS - if you're using 11gR1 or newer, you should definitely use that.

Matt
________________________________________
From: toasters-bounces@teaparty.net [toasters-bounces@teaparty.net] On Behalf Of Dan Finn [dan_j_finn@yahoo.com]
Sent: Wednesday, March 28, 2012 8:19 PM
To: Jeff Mohler; Roy Choudhury, Bikash
Cc: Mailing Lists
Subject: Re: Oracle (RHEL 5.7) on NFS (Ontap 8.1RC2) - complains of write

I don't remember what it's called but there's also a way that you can have Oracle manage the NFS mounts directly from inside the app.  We did this at my last place and there was a performance improvement.  I think it's a newer feature that is part of 10G or 11G, sorry, don't know the Oracle stuff that well.

That being said, it seems like DBAs are always complaining about performance but I'm never able to see it when testing from my end.

________________________________
From: Jeff Mohler <speedtoys.racing@gmail.com>
To: "Roy Choudhury, Bikash" <Bikash.Choudhury@netapp.com>
Cc: Mailing Lists <toasters@teaparty.net>
Sent: Wednesday, March 28, 2012 6:04 PM
Subject: Re: Oracle (RHEL 5.7) on NFS (Ontap 8.1RC2) - complains of write

*nod*

Dont work much in the DB area..was not sure.  :)

On Wed, Mar 28, 2012 at 4:57 PM, Roy Choudhury, Bikash <Bikash.Choudhury@netapp.com<mailto:Bikash.Choudhury@netapp.com>> wrote:
There is no "directio mount option in Linux.

Bikash

On Mar 28, 2012, at 4:54 PM, "Jeff Mohler" <speedtoys.racing@gmail.com<mailto:speedtoys.racing@gmail.com>> wrote:

I thought oracle over NFS wanted 'directio' as a mount option?



On Wed, Mar 28, 2012 at 4:42 PM, Fletcher Cocquyt <fcocquyt@stanford.edu<mailto:fcocquyt@stanford.edu>> wrote:
Hi, I'm not seeing write performance issues on the OS (throughput tests on the command line are > 100Mb/sec)

But Oracle is complaining about long commit times for the Netapp NFS mount with the following options:

rw,noatime,bg,hard,nointr,tcp,nfsvers=3,timeo=600,rsize=32768,wsize=32768 (matches what I see in Oracle and Netapp docs)

I'm working with the DBA to see if the Oracle tuning is optimal, but thought I'd poll this list for any nuggets of tuning Oracle on Netapp NFS

And the disk busy on this aggregate is only 10% - and the CPU reads 40-50%

thanks!

Fletcher






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