Re: Queries 15 times slower on 8.1 beta 2 than on 8.0

Explain analyze on my 8.0.1 installation does report the time for
slower queries but for this small query it reports 0.000 ms

----- Original Message -----
From: "Josh Berkus" <josh@agliodbs.com>
To: <pgsql-performance@postgresql.org>
Cc: "Jean-Pierre Pelletier" <pelletier_32@sympatico.ca>; "John Arbash
Meinel" <john@arbash-meinel.com>
Sent: Thursday, September 22, 2005 6:19 PM
Subject: Re: [PERFORM] Queries 15 times slower on 8.1 beta 2 than on 8.0


> Jean-Pierre,
>
> First off, you're on Windows?
>
>> "  ->  Seq Scan on price p  (cost=0.00..11317.75 rows=581475 width=4)
>> (actual time=0.004..1143.720 rows=581475 loops=1)"
>
> Well, this is your pain point.   Can we see the index scan plan on 8.1?
> Given that it's *expecting* only one row, I can't understand why it's
> using a seq scan ...
>
>> "Nested Loop Left Join  (cost=0.00..11.02 rows=1 width=0) (actual
>> time=0.000..0.000 rows=1 loops=1)"
>> "  ->  Nested Loop Left Join  (cost=0.00..5.48 rows=1 width=4) (actual
>> time=0.000..0.000 rows=1 loops=1)"
>> "Total runtime: 0.000 ms"
>
> Feh, this looks like the "windows does not report times" bug, which makes
> it hard to compare ...
>
> --
> --Josh
>
> Josh Berkus
> Aglio Database Solutions
> San Francisco
>
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