Re: Add the ability to limit the amount of memory that can be allocated to backends.

From: Andres Freund <andres(at)anarazel(dot)de>
To: Reid Thompson <reid(dot)thompson(at)crunchydata(dot)com>
Cc: vignesh C <vignesh21(at)gmail(dot)com>, Arne Roland <A(dot)Roland(at)index(dot)de>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, Ibrar Ahmed <ibrar(dot)ahmad(at)gmail(dot)com>
Subject: Re: Add the ability to limit the amount of memory that can be allocated to backends.
Date: 2023-02-14 00:26:27
Message-ID: 20230214002627.7btgrc34forjkm2i@awork3.anarazel.de
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Hi,

On 2023-01-26 15:27:20 -0500, Reid Thompson wrote:
> Yes, just a rebase. There is still work to be done per earlier in the
> thread.

The tests recently started to fail:

https://cirrus-ci.com/github/postgresql-cfbot/postgresql/commitfest%2F42%2F3867

> I do want to follow up and note re palloc/pfree vs malloc/free that the
> tracking code (0001-Add-tracking-...) is not tracking palloc/pfree but is
> explicitely tracking malloc/free. Not every palloc/pfree call executes the
> tracking code, only those where the path followed includes malloc() or
> free(). Routine palloc() calls fulfilled from the context's
> freelist/emptyblocks/freeblock/etc and pfree() calls not invoking free()
> avoid the tracking code.

Sure, but we create a lot of memory contexts, so that's not a whole lot of
comfort.

I marked this as waiting on author.

Greetings,

Andres Freund

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