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Re: WIP: cross column correlation ...

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Rod Taylor <rod(dot)taylor(at)gmail(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Josh Berkus <josh(at)agliodbs(dot)com>, PostgreSQL - Hans-Jürgen Schönig <postgres(at)cybertec(dot)at>, pgsql-hackers Hackers <pgsql-hackers(at)postgresql(dot)org>, Boszormenyi Zoltan <zb(at)cybertec(dot)at>
Subject: Re: WIP: cross column correlation ...
Date: 2011-02-25 19:26:10
Message-ID: 1298661927-sup-4013@alvh.no-ip.org (view raw or flat)
Thread:
Lists: pgsql-hackers
Excerpts from Rod Taylor's message of vie feb 25 14:03:58 -0300 2011:

> How practical would it be for analyze to keep a record of response times for
> given sections of a table as it randomly accesses them and generate some
> kind of a map for expected response times for the pieces of data it is
> analysing?

I think what you want is random_page_cost that can be tailored per
tablespace.

-- 
Álvaro Herrera <alvherre(at)commandprompt(dot)com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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