From: Bricklen Anderson <BAnderson@PresiNET.com>
To: David Gagnon <dgagnon@siunik.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Please help with this explain analyse...
Date: Mon, 28 Nov 2005 15:46:14 -0800
Message-ID: <438B96C6.4090902@PresiNET.com> (raw)
In-Reply-To: <438B958B.3010602@siunik.com>
References: <438B958B.3010602@siunik.com>
David Gagnon wrote:
> " -> Index Scan using cr_pk on cr (cost=0.00..6.02 rows=1
> width=828) (actual time=0.073..0.077 rows=1 loops=13587)"
> " Index Cond: (((cr.crypnum)::text = 'M'::text) AND
> (cr.crnum = "outer".cscrnum))"
> " Filter: ((crdate + '00:00:00'::interval) <=
> '2005-01-28 00:00:00'::timestamp without time zone)"
> " -> Index Scan using rr_pk on rr (cost=0.00..5.99 rows=1
> width=5637) (actual time=0.062..0.069 rows=1 loops=8335)"
> " Index Cond: (("outer".crrrnum)::text = (rr.rrnum)::text)"
> " -> Index Scan using yr_idx1 on yr (cost=0.00..5.99 rows=1
> width=926) (actual time=0.127..17.379 rows=1154 loops=8335)"
Your loops are what is causing the time spent.
eg. "actual time=0.127..17.379 rows=1154 loops=8335)" ==
8335*(17.379-0.127)/1000=>143 secs (if my math is correct).
--
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To: pgsql-performance@postgresql.org
Cc: BAnderson@PresiNET.com, dgagnon@siunik.com
Subject: Re: Please help with this explain analyse...
In-Reply-To: <438B96C6.4090902@PresiNET.com>
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