On Mon, Jan 28, 2013 at 3:43 PM, Alex Vinnik <alvinnik.g@gmail.com> wrote:
> It sure turned out that default settings are not a good fit. Setting
> random_page_cost to 1.0 made query to run in 2.6 seconds and I clearly see
> that indexes are being used in explain plan and IO utilization is close to
> 0.
>
> QUERY PLAN
> Sort (cost=969787.23..970288.67 rows=200575 width=8) (actual
> time=2176.045..2418.162 rows=241238 loops=1)
> Sort Key: visits.id, views.id
> Sort Method: external sort Disk: 4248kB
What query are you running? The query you originally showed us should
not be doing this sort in the first place.
Cheers,
Jeff