| From: | Reid Thompson <reid(dot)thompson(at)crunchydata(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | reid(dot)thompson(at)crunchydata(dot)com, 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: | 2023-01-26 20:27:20 |
| Message-ID: | 9b5226bf88ed5f09c7ae589a11c8fd147854eb98.camel@crunchydata.com |
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| Lists: | pgsql-hackers |
On Mon, 2023-01-23 at 12:31 -0800, Andres Freund wrote:
> Hi,
>
> I think it's basically still waiting on author, until the O(N) cost is gone
> from the overflow limit check.
>
> Greetings,
>
> Andres Freund
Yes, just a rebase. There is still work to be done per earlier in the
thread.
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.
Thanks,
Reid
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