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From: Cédric Villemain <[email protected]>
To: Andres Freund <[email protected]>
Cc: Tomas Vondra <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Adding basic NUMA awareness - Preliminary feedback and outline for an extensible approach
Date: Tue, 8 Jul 2025 01:55:00 +0000
Message-ID: <[email protected]> (raw)
In-Reply-To: <cwp57ttiqplhbobl74obmry4gjwtqhdh5omm7fhwgdvft4qg4q@jmpveobozjhj>
References: <[email protected]>
	<[email protected]>
	<cwp57ttiqplhbobl74obmry4gjwtqhdh5omm7fhwgdvft4qg4q@jmpveobozjhj>

Hi Andres,

> Hi,
> 
> On 2025-07-05 07:09:00 +0000, Cédric Villemain wrote:
>> In my work on more careful PostgreSQL resource management, I've come to the
>> conclusion that we should avoid pushing policy too deeply into the
>> PostgreSQL core itself. Therefore, I'm quite skeptical about integrating
>> NUMA-specific management directly into core PostgreSQL in such a way.
> 
> I think it's actually the opposite - whenever we pushed stuff like this
> outside of core it has hurt postgres substantially. Not having replication in
> core was a huge mistake. Not having HA management in core is probably the
> biggest current adoption hurdle for postgres.
> 
> To deal better with NUMA we need to improve memory placement and various
> algorithms, in an interrelated way - that's pretty much impossible to do
> outside of core.

Except the backend pinning which is easy to achieve, thus my comment on 
the related patch.
I'm not claiming NUMA memory and all should be managed outside of core 
(though I didn't read other patches yet).

-- 
Cédric Villemain +33 6 20 30 22 52
https://www.Data-Bene.io
PostgreSQL Support, Expertise, Training, R&D

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