Re: Help with optimizing query - Mailing list pgsql-general

From Gaetano Mendola
Subject Re: Help with optimizing query
Date
Msg-id 4125DD63.9000107@bigfoot.com
Whole thread Raw
In response to Help with optimizing query  (Marek Lewczuk <newsy@lewczuk.com>)
List pgsql-general
Marek Lewczuk wrote:

> Hello,
> I have a query, which is quite big and there is a huge difference
> between execution time in MySQL and PostgreSQL. I think that I have made
> all possible steps to increase the speed of the query, but unfortunately
>  it is still about 100 times slower. I'm out of ideas what to do next,
> so maybe you will point me what shall I do. In the attachment I send you
> the result of "explain analyze".
>
> I will be appreciated for any help. Thanks in advance.

Where is the query ?
Also tables definition could help.

The first look suggest that the statistics are not up to date or you
have to increase your default_statistics_target.

337 rows  vs  3618 rows

Regards
Gaetano Mendola







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