From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Thomas Munro <thomas.munro@enterprisedb.com>
Cc: Dilip Kumar <dilipbalaut@gmail.com>
Cc: Pg Hackers <pgsql-hackers@postgresql.org>
Subject: Re: shared memory based stat collector (was: Sharing record typmods between backends)
Date: Mon, 14 Aug 2017 12:28:39 -0400
Message-ID: <10227.1502728119@sss.pgh.pa.us> (raw)
In-Reply-To: <CA+TgmoZcOASyjF5MZ+r-uBxO4kjRONq4afe=vuaRCChw=E3HFw@mail.gmail.com>
References: <20170814005656.d5tvz464qkmz66tq@alap3.anarazel.de>
<32138.1502675970@sss.pgh.pa.us>
<CA+TgmobQVbz4K_+RSmiM9HeRKpy3vS5xnbkL95gSEnWijzprKQ@mail.gmail.com>
<9714.1502727365@sss.pgh.pa.us>
<CA+TgmoZcOASyjF5MZ+r-uBxO4kjRONq4afe=vuaRCChw=E3HFw@mail.gmail.com>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-hackers>
Robert Haas <robertmhaas@gmail.com> writes:
> On Mon, Aug 14, 2017 at 12:16 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Just FYI, the only values being reported by buildfarm animals are
>> "posix", "sysv", and "windows". So while mmap may be a thing,
>> it's an untested thing.
> I'm pretty sure I dev-tested it before committing anything, but,
> certainly, having ongoing BF coverage woudn't be a bad thing.
Looking closer, the reason those are the only reported values is
that those are the only possible results from initdb's
choose_dsm_implementation(). So the real question here is whether
"mmap" should be considered to dominate "sysv" if it's available.
If so, why isn't choose_dsm_implementation() trying it; and if not,
why are we carrying it?
regards, tom lane
--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, robertmhaas@gmail.com, alvherre@2ndquadrant.com, andres@anarazel.de, thomas.munro@enterprisedb.com, dilipbalaut@gmail.com
Subject: Re: shared memory based stat collector (was: Sharing record typmods between backends)
In-Reply-To: <10227.1502728119@sss.pgh.pa.us>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox