Re: Block level parallel vacuum WIP

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>
Cc: David Steele <david(at)pgmasters(dot)net>, Claudio Freire <klaussfreire(at)gmail(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Block level parallel vacuum WIP
Date: 2017-03-04 08:47:41
Message-ID: CA+TgmobLcu_q7-0-rqiBuzowZ1J-ywDHdgBJzXdSx978JPorKA@mail.gmail.com
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On Fri, Mar 3, 2017 at 9:50 PM, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
> Yes, it's taking a time to update logic and measurement but it's
> coming along. Also I'm working on changing deadlock detection. Will
> post new patch and measurement result.

I think that we should push this patch out to v11. I think there are
too many issues here to address in the limited time we have remaining
this cycle, and I believe that if we try to get them all solved in the
next few weeks we're likely to end up getting backed into some choices
by time pressure that we may later regret bitterly. Since I created
the deadlock issues that this patch is facing, I'm willing to try to
help solve them, but I think it's going to require considerable and
delicate surgery, and I don't think doing that under time pressure is
a good idea.

From a fairness point of view, a patch that's not in reviewable shape
on March 1st should really be pushed out, and we're several days past
that.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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