From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Peter Geoghegan <pg@bowt.ie>
Cc: Andres Freund <andres@anarazel.de>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Thomas Munro <thomas.munro@gmail.com>
Cc: Daniel Gustafsson <daniel@yesql.se>
Cc: Jonathan S. Katz <jkatz@postgresql.org>
Cc: Alexander Korotkov <a.korotkov@postgrespro.ru>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: David Rowley <dgrowleyml@gmail.com>
Subject: Re: Improving connection scalability: GetSnapshotData()
Date: Mon, 17 Aug 2020 16:09:40 -0400
Message-ID: <20200817200940.GA8323@alvherre.pgsql> (raw)
In-Reply-To: <CAH2-WzkuTcB2WbegRicnaVQ+igBsDP3AQawivEunEGR3m1vs0w@mail.gmail.com>
On 2020-Aug-16, Peter Geoghegan wrote:
> On Sun, Aug 16, 2020 at 2:11 PM Andres Freund <andres@anarazel.de> wrote:
> > For the first, one issue is that there's no obviously good candidate for
> > an uninitialized xid. We could use something like FrozenTransactionId,
> > which may never be in the procarray. But it's not exactly pretty.
>
> Maybe it would make sense to mark the fields as inaccessible or
> undefined to Valgrind. That has advantages and disadvantages that are
> obvious.
... and perhaps making Valgrind complain about it is sufficient.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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To: pgsql-hackers@postgresql.org
Cc: alvherre@2ndquadrant.com, pg@bowt.ie, andres@anarazel.de, tgl@sss.pgh.pa.us, robertmhaas@gmail.com, thomas.munro@gmail.com, daniel@yesql.se, jkatz@postgresql.org, a.korotkov@postgrespro.ru, bruce@momjian.us, dgrowleyml@gmail.com
Subject: Re: Improving connection scalability: GetSnapshotData()
In-Reply-To: <20200817200940.GA8323@alvherre.pgsql>
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