Re: unlogged tables

From: Kenneth Marshall <ktm(at)rice(dot)edu>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, marcin mank <marcin(dot)mank(at)gmail(dot)com>, Andy Colson <andy(at)squeakycode(dot)net>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: unlogged tables
Date: 2010-11-17 19:22:04
Message-ID: 20101117192204.GX14016@aart.is.rice.edu
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On Wed, Nov 17, 2010 at 02:16:06PM -0500, Tom Lane wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> > On Wed, Nov 17, 2010 at 1:46 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >> Robert is probably going to object that he wanted to prevent any
> >> fsyncing for unlogged tables, but the discussion over in pgsql-general
> >> is crystal clear that people do NOT want to lose unlogged data over
> >> a clean shutdown and restart. If all it takes to do that is to refrain
> >> from lobotomizing the checkpoint logic for unlogged tables, I say we
> >> should refrain.
>
> > I think that's absolutely a bad idea.
>
> The customer is always right, and I think we are hearing loud and clear
> what the customers want. Please let's not go out of our way to create
> a feature that isn't what they want.
>
> regards, tom lane
>

I would be fine with only having a safe shutdown with unlogged tables
and skip the checkpoint I/O all other times.

Cheers,
Ken

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