From: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> |
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To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Lamar Owen <lamar(dot)owen(at)wgcr(dot)org>, t-ishii(at)sra(dot)co(dot)jp, pgsql-hackers(at)postgreSQL(dot)org |
Subject: | Re: [HACKERS] sort on huge table |
Date: | 1999-11-02 02:41:59 |
Message-ID: | 199911020241.VAA06661@candle.pha.pa.us |
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Lists: | pgsql-hackers |
> Lamar Owen <lamar(dot)owen(at)wgcr(dot)org> writes:
> > How could I go about duplicating this?? Having multiple RedHat systems
> > available (both of the 2.2 and 2.0 variety), I'd be glad to test it
> > here. I'm pulling a cvs update as I write this. If possible, I'd like
> > to duplicate it exactly.
>
> Me too (modulo disk space issues --- maybe we should try to compare
> sorts of say 100MB, rather than 2GB). Tatsuo said he'd make his test
> script available.
I would be very interested if Tatsuo could comment out the f_reada line
in the function I posted, and see if the new kernel is faster on 7.0
sorts. That would clearly show the cause. I wouldn't be surprised if
7.0 sorts became faster than 6.5.* sorts.
--
Bruce Momjian | http://www.op.net/~candle
maillist(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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