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

On Mon, 2023-02-13 at 16:26 -0800, Andres Freund wrote:
> Hi,
>
> The tests recently started to fail:
>
> https://cirrus-ci.com/github/postgresql-cfbot/postgresql/commitfest%2F42%2F3867
>
> I marked this as waiting on author.
>
> Greetings,
>
> Andres Freund

Patch has been rebased to master.

The memory limiting portion (patch 0002-*) has been refactored to utilize a
shared counter for total memory allocation along with backend-local
allowances that are initialized at process startup and refilled from the
central counter upon being used up. Free'd memory is accumulated and
returned to the shared counter upon meeting a threshold and/or upon process
exit. At this point arbitrarily picked 1MB as the initial allowance and
return threshold.

Thanks,
Reid