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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Jim C. Nasby <jnasby@pervasive.com>
Cc: Markus Schaber <schabi@logix-tt.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: merge>hash>loop
Date: Tue, 18 Apr 2006 18:22:26 -0400
Message-ID: <19388.1145398946@sss.pgh.pa.us> (raw)
In-Reply-To: <20060418215238.GK49405@pervasive.com>
References: <1145029009.3422.31.camel@spectre.intellivid.com>
	<10000.1145031205@sss.pgh.pa.us>
	<1145033149.3422.41.camel@spectre.intellivid.com>
	<11035.1145033929@sss.pgh.pa.us>
	<4444C4CF.2000106@logix-tt.com>
	<20060418215238.GK49405@pervasive.com>

"Jim C. Nasby" <jnasby@pervasive.com> writes:
> Actually, if you run with stats_block_level turned on you have a
> first-order approximation of what is and isn't cached.

Only if those stats decayed (pretty fast) with time; which they don't.

			regards, tom lane

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