| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Stephen Frost <sfrost(at)snowman(dot)net>, Fabrízio Mello <fabriziomello(at)gmail(dot)com>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: GSoC proposal - "make an unlogged table logged" |
| Date: | 2014-03-04 18:29:03 |
| Message-ID: | 20140304182903.GC27273@alap3.anarazel.de |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On 2014-03-04 12:54:02 -0500, Robert Haas wrote:
> On Tue, Mar 4, 2014 at 9:50 AM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:
> > On 2014-03-04 09:47:08 -0500, Robert Haas wrote:
> > Can't that be solved by just creating the permanent relation in a new
> > relfilenode? That's equivalent to a rewrite, yes, but we need to do that
> > for anything but wal_level=minimal anyway.
>
> Yes, that would work. I've tended to view optimizing away the
> relfilenode copy as an indispensable part of this work, but that might
> be wrongheaded. It would certainly be a lot easier to make this
> happen if we didn't insist on that.
I think it'd already much better than today's situation, and it's a
required codepath for wal_level > logical anyway. So even if somebody
wants to make this work without the full copy for minimal, it'd still be
a required codepath. So I am perfectly ok with a patch just adding that.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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