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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Hell, Robert <Robert.Hell@fabasoft.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Cursors and different settings for default_statistics_target
Date: Tue, 01 Apr 2008 12:42:03 -0400
Message-ID: <9999.1207068123@sss.pgh.pa.us> (raw)
In-Reply-To: <B710F3299F04664DB6B37C258FDEEB940158B0FC@FABAMAIL.fabagl.fabasoft.com>
References: <B710F3299F04664DB6B37C258FDEEB940158AFF9@FABAMAIL.fabagl.fabasoft.com>
	<2798.1207063805@sss.pgh.pa.us>
	<B710F3299F04664DB6B37C258FDEEB940158B0E9@FABAMAIL.fabagl.fabasoft.com>
	<9629.1207066619@sss.pgh.pa.us>
	<B710F3299F04664DB6B37C258FDEEB940158B0FC@FABAMAIL.fabagl.fabasoft.com>

"Hell, Robert" <Robert.Hell@fabasoft.com> writes:
> That's CURSOR_OPT_FAST_PLAN and isn't it? Our application reads the full
> results of most cursors.

Just out of curiosity, why use a cursor at all then?  But anyway, you
might want to consider running a custom build with a higher setting for
tuple_fraction for OPT_FAST_PLAN (look into planner.c).  I've
occasionally thought about exposing that as a GUC parameter, but
never gotten motivated to do it.

			regards, tom lane



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