| From: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
|---|---|
| To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, Martijn van Oosterhout <kleptog(at)svana(dot)org>, Zeugswetter Andreas DCP SD <ZeugswetterA(at)spardat(dot)at>, Greg Stark <gsstark(at)mit(dot)edu>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Rod Taylor <pg(at)rbt(dot)ca>, "Bort, Paul" <pbort(at)tmwsystems(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Compression and on-disk sorting |
| Date: | 2006-06-07 17:27:26 |
| Message-ID: | 20060607172726.GV45331@pervasive.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Wed, Jun 07, 2006 at 04:11:57PM +0100, Simon Riggs wrote:
> On Wed, 2006-06-07 at 09:35 -0500, Jim C. Nasby wrote:
>
> > Would simply changing the ORDER BY to DESC suffice for this? FWIW:
>
> Try sorting on aid also, both ascneding and descending.
>
> We need to try lots of tests, not just one thats chosen to show the
> patch in the best light. I want this, but we need to check.
Well, correlation on everything in that table is 1. At this point maybe
it makes more sense to just come up with a different test case, possibly
generate_series and random. Better yet would be if someone came up with
a patch that actually populated the filler field in pgbench. Better
still would be allowing the user to define how large they wanted the
filler field to be...
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Markus Schiltknecht | 2006-06-07 17:29:56 | Re: Snowball and ispell in tsearch2 |
| Previous Message | Greg Stark | 2006-06-07 17:21:06 | Re: That EXPLAIN ANALYZE patch still needs work |