Didn't I already say Chapter 8 ????
:-)
Connor
- Jared Still <jkstill_at_cybcon.com> wrote: >
> Are these defaults recorded somewhere that
> mere mortals have access to?
>
> Jared
>
> On Thursday 07 June 2001 00:25, Mogens Nørgaard
> wrote:
> > Any stat missing in a CBO situation will be set to
> the hard-coded default
> > values found in the source code. One example (out
> of about 40 or so
> > values) is default selectivity for equality
> predicates. Before 7.3 it was
> > 0.125 (meaning that a where= condition would
> assume you needed to scan
> > 1/8th of the table). In 7.3 and later it was
> fortunately set to 0.01 (1%).
> > Another of my favorite default values is number of
> leaf blocks in an
> > index. It's 25.
> >
> > Connor McDonald wrote:
> > > Hi Jared,
> --
> Please see the official ORACLE-L FAQ:
> http://www.orafaq.com
> --
> Author: Jared Still
> INET: jkstill_at_cybcon.com
>
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Connor McDonald
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--
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Received on Thu Jun 07 2001 - 10:52:26 CDT
