From: ow <oneway_111@yahoo.com>
To: Bruce Momjian <pgman@candle.pha.pa.us>
Cc: pgsql-sql@postgresql.org
Subject: Re: pg 7.4.rc1, Range query performance
Date: Mon, 10 Nov 2003 17:10:39 -0800 (PST)
Message-ID: <20031111011039.18349.qmail@web21402.mail.yahoo.com> (raw)
In-Reply-To: <200311110050.hAB0ouQ11856@candle.pha.pa.us>
--- Bruce Momjian <pgman@candle.pha.pa.us> wrote:
> Strange 30 records takes 30x the time than one record. Can you run
> ANALYZE and send us an EXPLAIN of the query to make sure it hasn't
> changed?
>
explain analyze select * from Test
where a >= '2002-06-18'
and a <= '2002-07-18'
and b = 5
and c = 255
QUERY PLAN
Index Scan using ak_abc on test (cost=0.00..121.23 rows=34 width=53) (actual
time=18.060..10726.387 rows=31 loops=1)
Index Cond: (((a)::timestamp without time zone >= '2002-06-18
00:00:00'::timestamp without time zone) AND ((a)::timestamp without time zone
<= '2002-07-18 00:00:00'::timestamp without time zone) AND ((b)::integer = 5)
AND ((c) (..)
Total runtime: 10726.663 ms
Thanks
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To: pgsql-sql@postgresql.org
Cc: oneway_111@yahoo.com, pgman@candle.pha.pa.us
Subject: Re: pg 7.4.rc1, Range query performance
In-Reply-To: <20031111011039.18349.qmail@web21402.mail.yahoo.com>
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