| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Manfred Koizar <mkoi-pg(at)aon(dot)at>, pgsql-patches(at)postgresql(dot)org, ohp(at)pyrenet(dot)fr, pgsql-hackers list <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] Index creation takes for ever |
| Date: | 2003-12-01 05:02:54 |
| Message-ID: | 200312010502.hB152s918672@candle.pha.pa.us |
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| Lists: | pgsql-hackers pgsql-patches |
Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> >> If qsort is to blame, then maybe this patch could help. It sorts
> >> equal key values on item pointer. And if it doesn't help index
> >> creation speed, at least the resulting index has better correlation.
>
> > I will try to apply it within the next 48 hours.
>
> I think this is a *very* dubious idea. It introduces a low-level
> implementation dependency into our sort behavior on the strength of no
> more than an unfounded speculation that some platform's broken qsort
> might run faster. Even if the speculation were proven true, I'd be
> hesistant to apply it.
Roger --- patch removed. Thanks.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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