| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: POC: Sharing record typmods between backends |
| Date: | 2017-08-13 03:32:45 |
| Message-ID: | CA+TgmobX6ziAzK=LhZmce0nBD2_XQU-hWQaGRa4fgf15Hdek=w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sat, Aug 12, 2017 at 11:30 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> That seems to involve a lot more than this though, given that currently
> the stats collector data doesn't entirely have to be in memory. I've
> seen sites with a lot of databases with quite some per-database stats
> data. Don't think we can just require that to be in memory :(
Hmm. I'm not sure it wouldn't end up being *less* memory. Don't we
end up caching 1 copy of it per backend, at least for the database to
which that backend is connected? Accessing a shared copy would avoid
that sort of thing.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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