Re: Query much faster with enable_seqscan=0 - Mailing list pgsql-performance

How odd, I set the following:

seq_page_cost = 1.0
random_page_cost = 2.0

And now the query runs in milliseconds as opposed to 14 seconds. Could this really be the change? I am running ANALYZE
now- how often is it recommended to do this? 

Thank you

Ogden


On Sep 21, 2010, at 1:51 PM, Jesper Krogh wrote:

> On 2010-09-21 20:21, Ogden wrote:
>> I assume you mean random_page_cost? It is currently set to 4.0 - is it better to increase or decrease this value?
>>
>
> Should be lowered to a bit over seq_page_cost..  and more importantly.. you should
> make sure that you have updated your statistics .. run "ANALYZE";
>
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> Jesper
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