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From: Ian Westmacott <ianw@intellivid.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: Why hash join instead of nested loop?
Date: Tue, 09 Aug 2005 10:43:33 -0400
Message-ID: <1123598613.15206.17.camel@spectre.intellivid.com> (raw)
In-Reply-To: <15881.1123598017@sss.pgh.pa.us>
References: <41b0fe890508051135712a086b@mail.gmail.com>
	<001801c59a0a$f4be7480$9a00a8c0@OTTO>
	<41b0fe8905080516164464e04f@mail.gmail.com>
	<15425.1123304631@sss.pgh.pa.us>
	<41b0fe89050808100021a2a4fc@mail.gmail.com>
	<10930.1123549106@sss.pgh.pa.us>
	<1123589756.15206.4.camel@spectre.intellivid.com>
	<15881.1123598017@sss.pgh.pa.us>

Yes, sorry, two totally different machines.  The 7.4.8
run was on a dual P4 3.2GHz, and the 7.4.2 run was on
a dual hyperthreaded Xeon 2.4GHz.

	--Ian


On Tue, 2005-08-09 at 10:33, Tom Lane wrote:
> Ian Westmacott <ianw@intellivid.com> writes:
> > On Mon, 2005-08-08 at 20:58, Tom Lane wrote:
> >> I'd be interested to see results from other people using 7.4.* too.
> 
> > 7.4.8:
> >  Total runtime: 0.198 ms
> 
> > 7.4.2:
> >  Total runtime: 0.697 ms
> 
> Just to be clear: those are two different machines of different speeds,
> right?  I don't believe we put any factor-of-three speedups into 7.4.*
> after release ;-)
> 
> 			regards, tom lane




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