| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Nathan Bossart <nathandbossart(at)gmail(dot)com> |
| Cc: | "Bagga, Rishu" <bagrishu(at)amazon(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Andres Freund <andres(at)anarazel(dot)de>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, "Debnath, Shawn" <sdn(at)amazon(dot)com>, vignesh C <vignesh21(at)gmail(dot)com> |
| Subject: | Re: SLRUs in the main buffer pool - Page Header definitions |
| Date: | 2023-08-21 20:23:31 |
| Message-ID: | CA+TgmoYm5oYtu0SURNT-YUK6DodtfY5GAYvck_=X5xxede+TnQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Aug 18, 2023 at 12:15 PM Nathan Bossart
<nathandbossart(at)gmail(dot)com> wrote:
> I think I agree with Stephen. We routinely make changes that require
> updates to extensions, and I doubt anyone is terribly wild about
> maintaining two SLRU systems for several years.
Yeah, maintaining two systems doesn't sound like a good idea.
However, this would be a big change. I'm not sure how we validate a
change of this magnitude. There are both correctness and performance
considerations. I saw there had been a few performance results on the
thread from Thomas that spawned this thread; but I guess we'd want to
do more research. One question is: how do you decide how many buffers
to use for each SLRU, and how many to leave available for regular
data?
--
Robert Haas
EDB: http://www.enterprisedb.com
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