From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Andres Freund <andres@anarazel.de>
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: Fri, 5 Apr 2019 00:06:04 -0300
Message-ID: <20190405030604.GA3360@alvherre.pgsql> (raw)
In-Reply-To: <20190404214520.7rfufsubxekodypr@alap3.anarazel.de>
On 2019-Apr-04, Andres Freund wrote:
> On 2019-04-04 12:23:08 -0700, Andres Freund wrote:
> > Also, how is this code even close to correct?
> > CheckAndSetPageAllVisible() modifies the buffer in a crucial way, and
> > there's no WAL logging? Without even a comment arguing why that's OK (I
> > don't think it is)?
>
> Peter Geoghegan just reminded me over IM that there's actually logging
> inside log_heap_visible(), called from visibilitymap_set(). Still lacks
> a critical section though.
Hmm, isn't there already a critical section in visibilitymap_set itself?
> I still think this is the wrong architecture.
Hmm.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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Cc: alvherre@2ndquadrant.com, andres@anarazel.de, 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: <20190405030604.GA3360@alvherre.pgsql>
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