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From: Howard Cole <howardnews@selestial.com>
To: pgsql-performance@postgresql.org
Subject: Re: Tsearch2 Initial Search Speed
Date: Tue, 17 Jun 2008 14:28:23 +0100
Message-ID: <4857BBF7.7070909@selestial.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0806171407250.3987@aragorn.flymine.org>
References: <4856A91F.1020001@selestial.com>
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	<Pine.LNX.4.64.0806171202130.3987@aragorn.flymine.org>
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	<Pine.LNX.4.64.0806171228480.3987@aragorn.flymine.org>
	<4857A739.5020800@selestial.com>
	<Pine.LNX.4.64.0806171407250.3987@aragorn.flymine.org>


> Actually, the index returns page numbers in the table on disc which 
> may contain one or more rows that are relevant. Postgres has to fetch 
> the whole row to find out the email_id and any other information, 
> including whether the row is visible in your current transaction 
> (concurrency control complicates it all). Just having a page number 
> isn't much use to you!
>
> Matthew
>
I learn something new every day.

Thanks Matthew.



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