From: Tom Lane <tgl@sss.pgh.pa.us>
To: Pål Stenslet <paal.stenslet@exie.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Should Oracle outperform PostgreSQL on a complex multidimensional query?
Date: Sun, 11 Dec 2005 15:38:54 -0500
Message-ID: <18666.1134333534@sss.pgh.pa.us> (raw)
In-Reply-To: <43D5D5C1F10C384B9AB4AE34A0510EC12B2B66@e1.exie.no>
References: <43D5D5C1F10C384B9AB4AE34A0510EC12B2B66@e1.exie.no>
=?iso-8859-1?Q?P=E5l_Stenslet?= <paal.stenslet@exie.com> writes:
> I have established similar conditions for the query in PostgreSQL, and =
> it runs in about 30 seconds. Again the CPU utilization is high with no =
> noticable I/O. The query plan is of course very different from that of =
> Oracle, since PostgreSQL lacks the bitmap index merge operation.
Perhaps you should be trying this on PG 8.1? In any case, without
specific details of your schema or a look at EXPLAIN ANALYZE results,
it's unlikely that anyone is going to have any useful comments for you.
regards, tom lane
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, paal.stenslet@exie.com
Subject: Re: Should Oracle outperform PostgreSQL on a complex multidimensional query?
In-Reply-To: <18666.1134333534@sss.pgh.pa.us>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox