| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org |
| Cc: | "Jean-Pierre Pelletier" <pelletier_32(at)sympatico(dot)ca>, "John Arbash Meinel" <john(at)arbash-meinel(dot)com> |
| Subject: | Re: Queries 15 times slower on 8.1 beta 2 than on 8.0 |
| Date: | 2005-09-22 22:19:05 |
| Message-ID: | 200509221519.05555.josh@agliodbs.com |
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| Lists: | pgsql-performance |
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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