Re: query slow in 9i, but not slow in 8i

From: Daniel Fink <Daniel.Fink_at_Sun.COM>
Date: Wed, 03 Mar 2004 09:26:47 -0700
Message-id: <40460747.ECF61265@sun.com>

Did you use the try_harder hint with the CBO?

Jonathan Lewis wrote:

> That's nothing - I built one query that
> took over 4 hours to parse. Mind you,
> it was 255 tables, and rule based.
>
> (CBO parsed it in less than a second)
>
> Regards
>
> Jonathan Lewis
> http://www.jlcomp.demon.co.uk
>
> The Co-operative Oracle Users' FAQ
> http://www.jlcomp.demon.co.uk/faq/ind_faq.html
>
> March 2004 Hotsos Symposium - The Burden of Proof
> Dynamic Sampling - an investigation
> March 2004 Charlotte OUG (www.cltoug.org) CBO Tutorial
> April 2004 Iceland
> June 2004 UK - Optimising Oracle Seminar
>
> ----- Original Message -----
> From: "Mladen Gogala" <mladen_at_wangtrading.com>
> To: <oracle-l_at_freelists.org>
> Sent: Wednesday, March 03, 2004 2:23 PM
> Subject: Re: RE: query slow in 9i, but not slow in 8i
>
> > Parse time over a minute? Was it a huge query or not? I find it hard to
> believe.
> >
> >
>
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Received on Wed Mar 03 2004 - 10:24:14 CST