pg.ddx.io pgsql-hackers@postgresql.org mailing list archive help / color / mirror / Atom feed From: Tomas Vondra <tomas.vondra@enterprisedb.com>
To: Thomas Munro <thomas.munro@gmail.com>
Cc: Daniel Gustafsson <daniel@yesql.se>
Cc: Stephen Frost <sfrost@snowman.net>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: David Steele <david@pgmasters.net>
Cc: Dmitry Dolgov <9erthalion6@gmail.com>
Cc: Jakub Wartak <Jakub.Wartak@tomtom.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Subject: Re: WIP: WAL prefetch (another approach)
Date: Sat, 27 Nov 2021 00:34:21 +0100
Message-ID: <1099b5a9-a521-93ad-c551-0cacdac8cef8@enterprisedb.com> (raw )
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On 11/26/21 22:16, Thomas Munro wrote:
> On Fri, Nov 26, 2021 at 11:32 AM Tomas Vondra
> <tomas.vondra@enterprisedb.com> wrote:
>> The results are pretty good / similar to previous results. Replaying the
>> 1h worth of work on a smaller machine takes ~5:30h without prefetching
>> (master or with prefetching disabled). With prefetching enabled this
>> drops to ~2h (default config) and ~1h (with tuning).
>
> Thanks for testing! Wow, that's a nice graph.
>
> This has bit-rotted already due to Robert's work on ripping out
> globals, so I'll post a rebase early next week, and incorporate your
> code feedback.
>
One thing that's not clear to me is what happened to the reasons why
this feature was reverted in the PG14 cycle?
regards
--
Tomas Vondra
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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Cc: tomas.vondra@enterprisedb.com, thomas.munro@gmail.com, daniel@yesql.se, sfrost@snowman.net, alvherre@2ndquadrant.com, andres@anarazel.de, david@pgmasters.net, 9erthalion6@gmail.com, Jakub.Wartak@tomtom.com, tgl@sss.pgh.pa.us, tomas.vondra@2ndquadrant.com
Subject: Re: WIP: WAL prefetch (another approach)
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