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

On Thu, Oct 20, 2022 at 1:55 AM Andres Freund <andres(at)anarazel(dot)de> wrote:
>
> Hi,
>
> On 2022-10-11 10:21:17 +0700, John Naylor wrote:
> > On Tue, Oct 11, 2022 at 5:31 AM David Rowley <dgrowleyml(at)gmail(dot)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?

If that's the case, then great! The linked message didn't give me that
impression, but I won't worry about it.

--
John Naylor
EDB: http://www.enterprisedb.com