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Re: extending relations more efficiently

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Jeroen Vermeulen <jtv(at)xs4all(dot)nl>, Andres Freund <andres(at)anarazel(dot)de>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: extending relations more efficiently
Date: 2012-05-02 17:06:55
Message-ID: 1335978345-sup-7773@alvh.no-ip.org (view raw or flat)
Thread:
Lists: pgsql-hackers
Excerpts from Robert Haas's message of mié may 02 12:55:17 -0400 2012:
> 
> On Wed, May 2, 2012 at 12:46 PM, Alvaro Herrera
> <alvherre(at)commandprompt(dot)com> wrote:
> > Agreed.  Perhaps to solve this issue what we need is a way to migrate
> > tuples from later pages into earlier ones.  (This was one of the points,
> > never resolved, that we discussed during the VACUUM FULL rework.)
> 
> Yeah, I agree.  And frankly, we need to find a way to make it work
> without taking AccessExclusiveLock on the relation.  Having to run
> VACUUM FULL is killing actual users and scaring off potential ones.

And ideally without bloating the indexes while at it.

-- 
Álvaro Herrera <alvherre(at)commandprompt(dot)com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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