From: Nathan Bossart <nathandbossart@gmail.com>
To: Andres Freund <andres@anarazel.de>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Thomas Munro <thomas.munro@gmail.com>
Cc: Fujii Masao <fujii@postgresql.org>
Cc: Postgres hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: Weird failure with latches in curculio on v15
Date: Sun, 5 Feb 2023 16:46:31 -0800
Message-ID: <20230206004631.GA277434@nathanxps13> (raw)
In-Reply-To: <20230206000750.ohqjmbfo3trtwvhc@alap3.anarazel.de>
References: <20230201175806.GA3199959@nathanxps13>
<20230201223555.GA3721373@nathanxps13>
<Y9sam108o4mxZFiS@paquier.xyz>
<20230204113029.xlcqrbxhp6lerrnc@alap3.anarazel.de>
<20230204180354.GA258107@nathanxps13>
<Y979NR3U5VnWrTwB@paquier.xyz>
<20230205221938.GA274245@nathanxps13>
<20230205230157.45kl5gqryupzdoyb@alap3.anarazel.de>
<20230205235747.GA275913@nathanxps13>
<20230206000750.ohqjmbfo3trtwvhc@alap3.anarazel.de>
On Sun, Feb 05, 2023 at 04:07:50PM -0800, Andres Freund wrote:
> On 2023-02-05 15:57:47 -0800, Nathan Bossart wrote:
>> I agree that the shell overhead isn't the main performance issue,
>> but it's unclear to me how much of this should be baked into
>> PostgreSQL.
>
> I don't know fully either. But just reimplementing all of it in
> different modules doesn't seem like a sane approach either. A lot of it
> is policy that we need to solve once, centrally.
>
>> I mean, we could introduce a GUC that tells us how far ahead to
>> restore and have a background worker (or multiple background workers)
>> asynchronously pull files into a staging directory via the callbacks.
>> Is that the sort of scope you are envisioning?
>
> Closer, at least.
Got it. I suspect we'll want to do something similar for archive modules
eventually, too.
--
Nathan Bossart
Amazon Web Services: https://aws.amazon.com
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To: pgsql-hackers@postgresql.org
Cc: nathandbossart@gmail.com, andres@anarazel.de, michael@paquier.xyz, tgl@sss.pgh.pa.us, thomas.munro@gmail.com, fujii@postgresql.org, pgsql-hackers@lists.postgresql.org
Subject: Re: Weird failure with latches in curculio on v15
In-Reply-To: <20230206004631.GA277434@nathanxps13>
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