Re: Postgres 9.0 has a bias against indexes

From: Mladen Gogala <mladen(dot)gogala(at)vmsinfo(dot)com>
To: J Sisson <sisson(dot)j(at)gmail(dot)com>
Cc: "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Postgres 9.0 has a bias against indexes
Date: 2011-01-27 15:57:50
Message-ID: 4D4195FE.5000506@vmsinfo.com
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On 1/27/2011 10:51 AM, J Sisson wrote:
> Also, if random_page_cost is set to default (4.0), the planner will
> tend towards sequential scans.
scott=> show random_page_cost;
random_page_cost
------------------
1
(1 row)

scott=> show seq_page_cost;
seq_page_cost
---------------
2
(1 row)

--
Mladen Gogala
Sr. Oracle DBA
1500 Broadway
New York, NY 10036
(212) 329-5251
www.vmsinfo.com

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