Subject: Re: [HACKERS] PostgreSQL, NetBSD and NFS
To: Greg Copeland <>
From: Tom Lane <>
List: current-users
Date: 02/05/2003 13:26:00
Greg Copeland <> 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