Re: [HACKERS] sort on huge table - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: [HACKERS] sort on huge table
Date
Msg-id 199911020241.VAA06661@candle.pha.pa.us
Whole thread Raw
In response to Re: [HACKERS] sort on huge table  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
> Lamar Owen <lamar.owen@wgcr.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@candle.pha.pa.us            |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026
 


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