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Re: system stats (9205) - can they go stale?

From: Mladen Gogala <mgogala_at_allegientsystems.com>
Date: Thu, 26 May 2005 09:33:17 -0400
Message-ID: <4295D01D.9050509@allegientsystems.com>


Teehan, Mark wrote:

>Is there any way to tell if the optimizer has suddenly decided that it doesnt like the contents of sys.aux_stat$ any more?
>
>
>

Optimizer is not a PHB. Do 10053 or do "select * from table(DBMS_XPLAN.DISPLAY)" or do @?/rdbms/admin/utlxplp and you'll have a line which contains string "CPU costing" which can be in 3 states: On, Off or "Intel Inside". If your optimizer tells you that the CPU costing is on, then it uses the system statistics.

-- 
Mladen Gogala
Oracle DBA

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Received on Thu May 26 2005 - 09:38:47 CDT

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