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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Oleg Bartunov <oleg@sai.msu.su>
Cc: Ron Mayer <rm_pg@cheapcomplexdevices.com>
Cc: Teodor Sigaev <teodor@sigaev.ru>
Cc: pgsql-performance@postgresql.org
Subject: Re: Extremely slow intarray index creation and inserts.
Date: Thu, 19 Mar 2009 08:25:26 -0400
Message-ID: <25559.1237465526@sss.pgh.pa.us> (raw)
In-Reply-To: <Pine.LNX.4.64.0903191001380.31919@sn.sai.msu.ru>
References: <49BFD950.5040905@cheapcomplexdevices.com>
	<49BFEBD3.4000006@cheapcomplexdevices.com>
	<1804.1237346699@sss.pgh.pa.us>
	<49C11D6D.8020604@cheapcomplexdevices.com>
	<15055.1237407686@sss.pgh.pa.us>
	<Pine.LNX.4.64.0903191001380.31919@sn.sai.msu.ru>

Oleg Bartunov <oleg@sai.msu.su> writes:
> We usually say about 200 unique values as a limit for
> gist_int_ops.

That seems awfully small ... should we make gist_intbig_ops the default,
or more likely, raise the signature size of both opclasses?  Even at a
crossover point of 10000 I'm not sure that many real-world apps would
bother considering gist_int_ops.

			regards, tom lane



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