Re: dynamically allocating chunks from shared memory

On Mon, Jul 26, 2010 at 3:16 PM, Kevin Grittner
<Kevin(dot)Grittner(at)wicourts(dot)gov> wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>
>> I actually think that memory management is one of the weakest
>> elements of our current architecture
>
> I'm actually pretty impressed by the memory contexts in PostgreSQL.
> Apparently I'm not alone in that, either; a paper by Hellerstein,
> Stonebraker, and Hamilton[1] has this in section 7.2 (Memory
> Allocator):
>
> "The interested reader may want to browse the open-source PostgreSQL
> code. This utilizes a fairly sophisticated memory allocator."
>
> I think the problem here is that we don't extend that sophistication
> to shared memory.

That's one aspect of it, and the other is that we don't have much
global coordination about how we use it.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company