RE: Index problem

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04-20-2008, 08:42 AM

Bill Dare

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RE: Index problem

> -----Original Message-----
> From: owner-informix-list@iiug.org [SMTP

wner-informix-list@iiug.org]
> On Behalf Of Holger Steinestel
> Sent: Thursday, July 07, 2005 10:41 AM
> To: informix-list@iiug.org
> Subject: Re: Index problem
>
> I'll be back tomorrow with the new indices.
>
> Our business logic makes the first unique index necessary. The other
> one speeds up some reports and lists, I think. But I still do not
> understand why adding two new indices makes an INSERT faster.
[Bill Dare]
That's because it didn't make the INSERT faster. It seems to me
that you have limited access to this customers system and you only know
what they tell you. True?
Something else went on at that site which caused the performance
improvement. I've had my share of mystery problems caused by customer
DBAs while employed with software vendors for 15 years. You're lucky,
you got a mystery fix.
See if they changed anything in onconfig, maybe they had QSTATS
or WSTATS enabled before and they disabled them causing performance to
improve.

Bill

> scottishpoet schrieb:
> > col6 isn;t in the old index decinfitions at all.
> >
> > so quite probably they have found a better way to declare the
> uniquness
> > using a much smaller index which is easier to travers
>

sending to informix-list

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RE: Index problem