Horton

Re: WIP: cross column correlation ...

Robert Haas <robertmhaas@gmail.com>

View thread
From: Robert Haas <robertmhaas@gmail.com>
To: Alvaro Herrera <alvherre@commandprompt.com>
Cc: Rod Taylor <rod.taylor@gmail.com>, Bruce Momjian <bruce@momjian.us>, Josh Berkus <josh@agliodbs.com>, PostgreSQL - Hans-Jürgen Schönig <postgres@cybertec.at>, pgsql-hackers Hackers <pgsql-hackers@postgresql.org>, Boszormenyi Zoltan <zb@cybertec.at>
Date: 2011-02-26T05:24:26Z
Lists: pgsql-hackers 
On Fri, Feb 25, 2011 at 2:26 PM, Alvaro Herrera
<alvherre@commandprompt.com> wrote:
> 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.

We have that.

But it's not the same as tracking *sections of a table*.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company