Horton

Re: [WIP] cache estimates, cache access cost

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Alvaro Herrera <alvherre@commandprompt.com>
Cc: Cédric Villemain <cedric.villemain.debian@gmail.com>, Greg Smith <greg@2ndquadrant.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2011-06-14T22:02:25Z
Lists: pgsql-hackers 
Alvaro Herrera <alvherre@commandprompt.com> writes:
> Excerpts from Cdric Villemain's message of mar jun 14 10:29:36 -0400 2011:
>> 0001-Add-reloscache-column-to-pg_class.patch

> Hmm, do you really need this to be a new column?  Would it work to have
> it be a reloption?

If it's to be updated in the same way as ANALYZE updates reltuples and
relpages (ie, an in-place non-transactional update), I think it'll have
to be a real column.

			regards, tom lane