You should in test env before changing the optimizer
through intensive benchmarks. However, if you are
working with 8i, try with outlines. Consider changing
to first_rows and evaluate the set of
optimizer_index_caching, optimizer_index_cost_adj and
optimizer_max_permutations.
Regards.
- Shaw John-P55297 <P55297_at_motorola.com> wrote:
> I have a large app that is still running rule based,
> we are finally going to
> take the plunge and try to start going cost based.
> The first time we tried
> this the performance was terrible in a lot of
> places. Does anyone have any
> good white papers or hints/tips on what to look for
> on areas that might be
> problems or pitfalls?
> tia
> ... --- ... .... . .-.. .--. -- . .. .----. -... . .
> -. .--. .-. --- -...
> .-..
> John B. Shaw
> (ribit)
> /
> o o
> ( -- )
> /\( , ,)/\
> ^^ ^^ ^^ ^^
>
> --
> Please see the official ORACLE-L FAQ:
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> Author: Shaw John-P55297
> INET: P55297_at_motorola.com
>
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ENG. Christian Trassens
Senior DBA
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christian_trassens_at_yahoo.es
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Received on Tue Jan 22 2002 - 13:00:29 CST
