| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
| Cc: | Cédric Villemain <cedric(dot)villemain(dot)debian(at)gmail(dot)com>, Greg Smith <greg(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [WIP] cache estimates, cache access cost |
| Date: | 2011-06-14 22:02:25 |
| Message-ID: | 9373.1308088945@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Alvaro Herrera <alvherre(at)commandprompt(dot)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
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