Re: Query planner problem - Mailing list pgsql-general

From Stephan Szabo
Subject Re: Query planner problem
Date
Msg-id 20020313102716.D84314-100000@megazone23.bigpanda.com
Whole thread Raw
In response to Query planner problem  ("Crash Dummy" <crash.dummy@ntlworld.com>)
List pgsql-general
On Sat, 9 Mar 2002, Crash Dummy wrote:

> Hi,
>
> I've moved a database onto a much faster machine but for some reason the
> query planner is opting to use seq scan methods rather than the indexes.
>
> This is a very large database without the indexes the performance is dire -
> the new machine is a 2Ghz P4 with 1GB RAM, the old machine is a 900Mhz P3
> with 512Mb Ram.
>
> Any idea why this is happening adn what I can do to solve the problem ? I've
> tried dropping & rebuilding the indexes, vacuum analyze etc but to no
> effect.

What do the schema and queries look like, and what does explain (explain
analyze if you've got 7.2) show for them?


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