Subject: Re: [HACKERS] PostgreSQL, NetBSD and NFS
To: D'Arcy J.M. Cain <firstname.lastname@example.org>
From: mlw <email@example.com>
Date: 01/30/2003 14:02:02
Forgive my stupidity, are you running PostgreSQL with the data on an NFS
D'Arcy J.M. Cain wrote:
>I have posted before about this but I am now posting to both NetBSD and
>PostgreSQL since it seems to be some sort of interaction between the two. I
>have a NetAPP filer on which I am putting a PostgreSQL database. I run
>PostgreSQL on a NetBSD box. I used rsync to get the database onto the filer
>with no problem whatsoever but as soon as I try to open the database the NFS
>mount hangs and I can't do any operations on that mounted drive without
>hanging. Other things continue to run but the minute I do a df or an ls on
>that drive that terminal is lost.
>On the NetBSD side I get a "server not responding" error. On the filer I see
>no problems at all. A reboot of the filer doesn't correct anything.
>Since NetBSD works just fine with this until I start PostgreSQL and
>PostgreSQL, from all reports, works well with the NetApp filer, I assume that
>there is something out of the ordinary about PostgreSQL's disk access that is
>triggering some subtle bug in NetBSD. Does the shared memory stuff use disk
>at all? Perhaps that's the difference between PostgreSQL and other
>The NetApp people are being very helpful and are willing to follow up any
>leads people might have and may even suggest fixes if necessary. I have
>Bcc'd the engineer on this message and will send anything I get to them.