| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Mark kirkwood <markir(at)slingshot(dot)co(dot)nz> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Re : Solaris Performance - Profiling (Solved) |
| Date: | 2002-04-03 18:41:14 |
| Message-ID: | 200204031841.g33IfEm10104@candle.pha.pa.us |
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| Lists: | pgsql-general pgsql-hackers |
Mark kirkwood wrote:
> > It might be entertaining to snarf a qsort off the net (from glibc,
> > perhaps) and link it into Postgres to see if you get better results.
> >
> > regards, tom lane
> >
> Indeed it is - obtained qsort.c from Freebsd CVS and rebuilt Postgresql :
> The query now takes 6 seconds instead of 1 hour ! Thanks for an
> excellent suggestion.
That is shocking. I have the Solaris 8 source code here so if people
want info on exactly what is done in their qsort() routine, I can supply
that. How can a routine change a query from 1 hour to 6 seconds?
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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