Re: performance on selecting a row in large tables

Hi Rainer,

On Tue, Feb 05, 2008 at 09:07:26AM +1300, Rainer Spittel wrote:

> When performing a 'select col01_id from table limit 1 offset 100000;',

As Tom already stated, the result of this query is a bit random since
there is no ordering at all. What are you actually querying for?

Try tuning queries before tuning the server.

> Looking forward for any comments or suggestions.

Here it is, right at the bottom of your mail:

> ---------------------------(end of broadcast)---------------------------
> TIP 6: explain analyze is your friend

explain analyze select col01_id from table limit 1 offset 100000;
will run the query and show you how the query plan looks and how much
time is spent. It is likely to say "SeqScan" somewhere - a sequential
scan of the tabe.

HTH!

Tino.

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