| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | David Rowley <dgrowleyml(at)gmail(dot)com> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Julien Rouhaud <rjuju123(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Yura Sokolov <y(dot)sokolov(at)postgrespro(dot)ru>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Reducing the chunk header sizes on all memory context types |
| Date: | 2022-10-06 17:38:28 |
| Message-ID: | 2869610.1665077908@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
David Rowley <dgrowleyml(at)gmail(dot)com> writes:
> I did see that PostGIS does use
> MemoryContextContains(), though I didn't look at their code to figure
> out if they're always passing it a pointer to an allocated chunk.
As far as I can tell from a cursory look, they should be able to use
the GetMemoryChunkContext workaround, because they are just doing this
with SHARED_GSERIALIZED objects, which seem to always be palloc'd.
regards, tom lane
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