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Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2

From: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
To: "Robert Haas" <robertmhaas(at)gmail(dot)com>, "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: "Achilleas Mantzios" <achill(at)matrix(dot)gatewaynet(dot)com>, <pgsql-performance(at)postgresql(dot)org>
Subject: Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
Date: 2011-01-21 20:00:44
Message-ID: 4D39918C02000025000399DE@gw.wicourts.gov (view raw or flat)
Thread:
Lists: pgsql-performance
Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
 
> If it should be less than 1, then what?
 
1 - (estimated tuples / estimated distinct values) ?
 
-Kevin


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