From: Tom Lane <tgl@sss.pgh.pa.us>
To: Gurpreet Aulakh <gaulakh@ecmarket.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Query slower on 8.0.3 (Windows) vs 7.3 (cygwin)
Date: Wed, 21 Sep 2005 23:12:57 -0400
Message-ID: <24008.1127358777@sss.pgh.pa.us> (raw)
In-Reply-To: <IGEGINLEEDLANNHAAKCMIECGCCAA.gaulakh@ecmarket.com>
References: <IGEGINLEEDLANNHAAKCMIECGCCAA.gaulakh@ecmarket.com>
"Gurpreet Aulakh" <gaulakh@ecmarket.com> writes:
> What is really interesting is the time it takes for the Hash to occur. For
> the first hash, on the 7.3 it takes only 12ms while on the 8.0 it takes
> 47ms.
You haven't told us a thing about the column datatypes involved (much
less what the query actually is) ... but I wonder if this is a textual
datatype and the 8.0 installation is using a non-C locale where the 7.3
installation is using C locale. That could account for a considerable
slowdown in text comparison speeds.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, gaulakh@ecmarket.com
Subject: Re: Query slower on 8.0.3 (Windows) vs 7.3 (cygwin)
In-Reply-To: <24008.1127358777@sss.pgh.pa.us>
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