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Home -> Community -> Mailing Lists -> Oracle-L -> Re: 815 much slower than 734
were you using Rule based optimiser on your 7.3 instance, with perhaps
optimizer_mode =choose on 8.1.5?
If the 7.3 had been upgraded from earlier releases, the optimizer mode could have been set to rule to accomodate tuned execution plans.
In your 8.1.5 , if optimizer mode is now choose but the tables have not been analyzed then full scans would occur.
probably nothing to do with it, but .........:-)
-- Rod Lane Associates RodCorderey_at_Lane-Associates.com http://www.Lane-Associates.com Louis BROUILLETTE wrote:Received on Wed May 17 2000 - 04:23:21 CDT
>
>
> Environment:
> AIX 4.2.1
> Oracle 8.1.5
>
> I migrated a test database from 7.3.4.5 to 8.1.5.
> Anything obvious why the 8.1.5 database would be much slower than the 7.3.4
> database ? Is there an init parameter that I should change to make it
> faster ?
>
> Louis Brouillette
> Analyste en informatique (DBA)
> Universite du Quebec a Trois-Rivieres
> Tel: (819) 376-5011 ext. 2435
> Email: Louis_Brouillette_at_uqtr.uquebec.ca
> --
> Author: Louis BROUILLETTE
> INET: Louis_Brouillette_at_UQTR.UQuebec.CA
>
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