| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Cédric Villemain <cedric(dot)villemain(dot)debian(at)gmail(dot)com> |
| Cc: | Greg Stark <stark(at)mit(dot)edu>, Greg Smith <greg(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [WIP] cache estimates, cache access cost |
| Date: | 2011-06-20 00:49:19 |
| Message-ID: | BANLkTi=Js-cMcaUNMJf3jD7yWfY=LHXCtQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, Jun 19, 2011 at 3:32 PM, Cédric Villemain
<cedric(dot)villemain(dot)debian(at)gmail(dot)com> wrote:
> 2nd, I provided the patches on the last CF, exactly to allow to go to
> the exciting part: the cost-estimates changes. (after all, we can work
> on the cost estimate, and if later we find a way to use ALTER TABLE or
> pg_class_ng, just do it instead of via the ANALYZE magic)
We're talking past each other here, somehow. The cost-estimating part
does not require this patch in order to something useful, but this
patch, AFAICT, absolutely does require the cost-estimating part to do
something useful.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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