Re: NFS performance tuning

>>>>> "Scott" == scott marlowe <scott(dot)marlowe(at)ihs(dot)com> writes:

Scott> On Sun, 31 Aug 2003, Jefim M wrote:
>> I have the following setup for my PostgreSQL box: 4GB Ram Dual
>> CPU Redhat 7.3 with 2.4.20-18.7smp kernel 2 network cards - one
>> is dedicated to internal traffic to the NetApp filer and other
>> is used for other traffic
>>
>> and all the Postgres database resides on the NetApp filer using
>> NFS. Number of the connection to the database is configured to
>> 64.
>>
>> What are best configuration setting I need to use on my
>> PostgreSQL and Linux boxes to get the best performance from
>> PostgresSQL? Are there any recomendations for the given setup
>> (having the data on the remote server) ?

Scott> We use a netapp and I had to muck around with the default
Scott> settings under rh7.2 to get reliable behaviour. Note that
Scott> our database does not sit on a netapp, only our semi-static
Scott> web content does.

Scott> Here's the settings I added, at the behest of one of our
Scott> unix / linux ubergeeks:

Scott> timeo=10,retry=1,bg,soft,intr,rsize=8192,wsize=8192

Argh, don't use soft mounting when the database is being accessed
through NFS and you value your data. Check out nfs.sf.net, there is a
HOWTO and FAQ for Linux NFS issues. netapp also has a very good
LInux/Netapp document written by a netapp employee who also hacks the
Linux kernel client. A google on "netapp linux howto" should find it
easily enough.

Sincerely,

Adrian Phillips

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