Re: Reducing the chunk header sizes on all memory context types

Hi,

On 2022-10-11 10:21:17 +0700, John Naylor wrote:
> On Tue, Oct 11, 2022 at 5:31 AM David Rowley <dgrowleyml@gmail.com> wrote:
> >
> > The proposed patches in [1] do aim to make additional usages of the
> > slab allocator, and I have a feeling that we'll want to fix the
> > performance of slab.c before those. Perhaps the Asserts are a better
> > option if we're to get the proposed radix tree implementation.
> 
> Going by [1], that use case is not actually a natural fit for slab because
> of memory fragmentation.
>
> [1]
> https://www.postgresql.org/message-id/20220704220038.at2ane5xkymzzssb%40awork3.anarazel.de

Not so sure about that - IIRC I made one slab for each different size class,
which seemed to work well and suit slab well?

Greetings,

Andres Freund