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From: Tom Lane <tgl@sss.pgh.pa.us>
To: s d <s.d.sauron@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Beginner Question
Date: Mon, 09 Apr 2007 10:49:17 -0400
Message-ID: <27869.1176130157@sss.pgh.pa.us> (raw)
In-Reply-To: <24b53fa00704090209pcdd2c6cof487d6388c1743b8@mail.gmail.com>
References: <24b53fa00704090209pcdd2c6cof487d6388c1743b8@mail.gmail.com>

"s d" <s.d.sauron@gmail.com> writes:
> 1. i can undestand where the cost=11.53 came from but where did the
> 1192.09 come form? The values are in milli right ?

No, the unit of estimated cost is 1 disk page fetch.  See
http://www.postgresql.org/docs/8.2/static/using-explain.html

			regards, tom lane

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