From: Luke Lonergan <llonergan@greenplum.com>
To: Alvaro Herrera <alvherre@commandprompt.com>
To: Gregory Stark <gsstark@mit.edu>
Cc: Chad Wagner <chad.wagner@gmail.com>
Cc: Simon Riggs <simon@2ndquadrant.com>
Cc: Igor Lobanov <ilobanov@swsoft.com>
Cc: Richard Huxton <dev@archonet.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Querying distinct values from a large table
Date: Tue, 30 Jan 2007 10:20:28 -0800
Message-ID: <C1E4CC6C.19A2C%llonergan@greenplum.com> (raw)
In-Reply-To: <20070130170443.GJ2303@alvh.no-ip.org>
Alvaro,
On 1/30/07 9:04 AM, "Alvaro Herrera" <alvherre@commandprompt.com> wrote:
>> (Incidentally I'm not sure where 2-5x comes from. It's entirely dependant on
>> your data distribution. It's not hard to come up with distributions where
>> it's
>> 1000x as fast and others where there's no speed difference.)
>
> So the figure is really "1-1000x"? I bet this one is more impressive in
> PHB terms.
You got me - I'll bite - what's PHB?
- Luke
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: llonergan@greenplum.com, alvherre@commandprompt.com, gsstark@mit.edu, chad.wagner@gmail.com, simon@2ndquadrant.com, ilobanov@swsoft.com, dev@archonet.com
Subject: Re: Querying distinct values from a large table
In-Reply-To: <C1E4CC6C.19A2C%llonergan@greenplum.com>
* 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