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

Here are the explain analyze:

On 8.1 beta2:

"Nested Loop Left Join  (cost=0.00..18591.77 rows=1 width=0) (actual
time=1320.302..2439.066 rows=1 loops=1)"
"  Join Filter: ("outer".priceid = "inner".priceid)"
"  ->  Nested Loop Left Join  (cost=0.00..5.59 rows=1 width=4) (actual
time=0.044..0.058 rows=1 loops=1)"
"        ->  Seq Scan on content c  (cost=0.00..1.01 rows=1 width=8) (actual
time=0.009..0.011 rows=1 loops=1)"
"        ->  Index Scan using "Supplier Id" on supplier s  (cost=0.00..4.56
rows=1 width=4) (actual time=0.016..0.022 rows=1 loops=1)"
"              Index Cond: ("outer".supplierid = s.supplierid)"
"  ->  Seq Scan on price p  (cost=0.00..11317.75 rows=581475 width=4)
(actual time=0.004..1143.720 rows=581475 loops=1)"
"Total runtime: 2439.211 ms"

On 8.0.1:

"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)"
"        ->  Seq Scan on content c  (cost=0.00..1.01 rows=1 width=8) (actual
time=0.000..0.000 rows=1 loops=1)"
"        ->  Index Scan using "Supplier Id" on supplier s  (cost=0.00..4.46
rows=1 width=4) (actual time=0.000..0.000 rows=1 loops=1)"
"              Index Cond: ("outer".supplierid = s.supplierid)"
"  ->  Index Scan using "Price Id" on price p  (cost=0.00..5.53 rows=1
width=4) (actual time=0.000..0.000 rows=1 loops=1)"
"        Index Cond: ("outer".priceid = p.priceid)"
"Total runtime: 0.000 ms"

----- Original Message -----
From: "John Arbash Meinel" <john@arbash-meinel.com>
To: "Jean-Pierre Pelletier" <pelletier_32@sympatico.ca>
Cc: <pgsql-performance@postgresql.org>
Sent: Thursday, September 22, 2005 5:48 PM
Subject: Re: [PERFORM] Queries 15 times slower on 8.1 beta 2 than on 8.0