From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Pavan Deolasee <pavan.deolasee@gmail.com>
Cc: Masahiko Sawada <sawada.mshk@gmail.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Cc: Jeff Janes <jeff.janes@gmail.com>
Cc: Simon Riggs <simon@2ndquadrant.com>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Subject: Re: COPY FREEZE and setting PD_ALL_VISIBLE/visibility map bits
Date: Thu, 04 Apr 2019 23:57:58 -0400
Message-ID: <959.1554436678@sss.pgh.pa.us> (raw)
In-Reply-To: <20190405033537.vklegbflesm2c7m3@alap3.anarazel.de>
References: <20190404214520.7rfufsubxekodypr@alap3.anarazel.de>
<20190405030604.GA3360@alvherre.pgsql>
<20190405033537.vklegbflesm2c7m3@alap3.anarazel.de>
Andres Freund <andres@anarazel.de> writes:
> I think the right approach would be to do all of this in heap_insert and
> heap_multi_insert. Whenever starting to work on a page, if INSERT_FROZEN
> is specified, remember whether it is either currently empty, or is
> already marked as all-visible. If previously empty, mark it as all
> visible at the end. If already all visible, there's no need to change
> that. If not yet all-visible, no need to do anything, since it can't
> have been inserted with COPY FREEZE. Do you see any problem doing it
> that way?
Do we want to add overhead to these hot-spot routines for this purpose?
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, andres@anarazel.de, alvherre@2ndquadrant.com, pavan.deolasee@gmail.com, sawada.mshk@gmail.com, jeff.janes@gmail.com, simon@2ndquadrant.com, tomas.vondra@2ndquadrant.com
Subject: Re: COPY FREEZE and setting PD_ALL_VISIBLE/visibility map bits
In-Reply-To: <959.1554436678@sss.pgh.pa.us>
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