Re: [HACKERS] sort on huge table

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
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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> 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
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