Re: SLRUs in the main buffer pool - Page Header definitions

On Fri, Aug 18, 2023 at 12:15 PM Nathan Bossart
<nathandbossart@gmail.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