Re: significant slow down with various LIMIT - Mailing list pgsql-performance

From Kevin Grittner
Subject Re: significant slow down with various LIMIT
Date
Msg-id 4BBDC19A02000025000305A4@gw.wicourts.gov
Whole thread Raw
In response to significant slow down with various LIMIT  (norn <andrey.perliev@gmail.com>)
List pgsql-performance
norn <andrey.perliev@gmail.com> wrote:

> I have some mysterious slow downs with ORDER BY and LIMIT. When
> LIMIT getting greater than some value (greater than 3 in my case),
> query takes 4-5 secs instead of 0.25ms. All of the necessary
> indexes are in place. I have no idea what to do, so any advices
> are welcome!

Could you show us the output from "select version();", describe your
hardware and OS, and show us the contents of your postgresql.conf
file (with all comments removed)?  We can then give more concrete
advice than is possible with the information provided so far.

http://wiki.postgresql.org/wiki/SlowQueryQuestions

-Kevin

pgsql-performance by date:

Previous
From: Andy Colson
Date:
Subject: Re: How check execution plan of a function
Next
From: Robert Haas
Date:
Subject: Re: PostgreSQL with Zabbix - problem of newbe