NESTED_TABLE_GET_REFS hint

Hi,

I'm currently defining an optimization strategy for a reporting environment. The reporting environment is refreshing 41 materialized views on a weekly basis.
Some of the MV take over an 1 hour to refresh.

During the MV refresh, in Statspack, I can see that the top SQL are Oracle generated SQL using the NESTED_TABLE_GET_REFS hint.

>From metalink : "If this is a DSS system, you probably have a smaller shared
pool and use import/export heavily. If so,it might be a good idea to use a bigger shared pool when doing this activity."

Anyone has more info on this.

TIA Stephane Paquette
Administrateur de bases de donnees

Database Administrator

Standard Life

www.standardlife.ca

Tél. (514) 925-7187

stephane.paquette_at_standardlife.ca

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