RE: slow SORT by fields other than the first

[Hughes, Jason D]

I figured it out.  It is a UTF-8 processing thing.  Setting LANG=C fixes it.

-Jason


>  -----Original Message-----
> From:         Hughes, Jason D  
> Sent: Thursday, September 16, 2004 6:23 PM
> To:   'address@hidden'
> Subject:      slow SORT by fields other than the first
> 
> 
> "sort -k2" is *much* slower than "sort -k1" on a new Linux installation.
> "sort -k3" is even slower.  I have never found this to be the case before.
> 
> The new system is Suse9.1, dual Opteron, 64-bit mode.  I have a
> near-identical machine running Suse9.0 in 32-bit mode.  The 64-bit system
> is usually just a bit faster in every benchmark.  "sort" is the big
> exception.  The effect is a 10-100x slowdown.
> 
> I can rule out most hardware or kernel effects since I have programs that
> do similar things running as expected.  It seems that the algorithm for
> parsing fields in sort has been changed for the worse.  Is there anything
> I can do about this?
> 
> Thanks.
> 
> -Jason
> 
> 


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