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Home -> Community -> Mailing Lists -> Oracle-L -> Re: optimizer_max_permutations
Note that even if you set optimizer_max_permutation to a small value, then
big multitable joins may still use more permutations than set by o_m_p
parameter.
This behaviour is dependent on number of tables in join and _optimizer_search_limit parameter. Ixora has more information on it.
Tanel.
> I've been talking to Oracle Support about some performance problems and
they told me to set optimizer_max_permutations=2000
>
> Has anyone tested how this effects the CBO? This is on 9.2.0.4 on Solaris.
>
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-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------Received on Wed Mar 03 2004 - 17:47:47 CST