Horton

Re: PostgreSQL, NetBSD and NFS

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Greg Copeland <greg@copelandconsulting.net>
Cc: "D'Arcy J.M. Cain" <darcy@druid.net>, PostgresSQL Hackers Mailing List <pgsql-hackers@postgresql.org>, current-users@netbsd.org
Date: 2003-02-05T18:26:00Z
Lists: pgsql-hackers 
Greg Copeland <greg@copelandconsulting.net> writes:
> On Wed, 2003-02-05 at 11:18, Tom Lane wrote:
>> Wild thought here: can you reduce the MTU on the LAN linking the NFS
>> server to the NetBSD box?  If so, does it help?

> I'm curious as to why you think adjusting the MTU may have an effect on
> this.  Lowering the MTU may actually increase fragmentation, lower
> efficiency, and even exacerbate the situation.

I'm thinking maybe one or both LAN cards have a problem with packets
exceeding a certain size.

> Is this purely a diagnostic suggestion?

Well, if it changes anything then it would definitely show there's a
hardware problem to fix...

			regards, tom lane