Re: Index only select count(*)

Hi,

yes, I'm cheating by using GUI :) (PgAdmin)

Here:

"Aggregate  (cost=18240.50..18240.51 rows=1 width=0) (actual time=2911.117..2911.119 rows=1 loops=1)"
"  ->  Seq Scan on min1_009  (cost=0.00..18108.60 rows=52760 width=0) (actual time=5.390..2816.274 rows=52760 loops=1)"
"Total runtime: 2912.211 ms"

-----Original Message-----
From: Alban Hertroys [mailto:haramrae@gmail.com]
Sent: 7. lokakuuta 2013 12:31
To: Toni Helenius
Cc: pgsql-general@postgresql.org
Subject: Re: [GENERAL] Index only select count(*)

On Oct 7, 2013, at 11:23, Toni Helenius <Toni.Helenius@syncrontech.com> wrote:

> The output of analyze:
> "Aggregate  (cost=18240.50..18240.51 rows=1 width=0)"
> "  ->  Seq Scan on min1_009  (cost=0.00..18108.60 rows=52760 width=0)"

That's the output of Explain, not of Explain Analyze. The latter has actual measurements to go with the estimated
costs,which gives a lot more insight. 

Alban Hertroys
--
If you can't see the forest for the trees, cut the trees and you'll find there is no forest.