Oracle Tips by Burleson

Oracle 10g Guidelines

Oracle suggests the following best practices for collecting statistics.

• Collect statistics for normal data dictionary objects using the same interval that you would analyze objects in your schemas. In addition, you need to analyze the dictionary objects after a sufficient amount of DDL operations have occurred.
   

• Use the procedures gather_database_stats or gather_schema_stats with options set to GATHER AUTO. With this feature, only the objects that need to be re-analyzed are processed every time.
   

• For fixed objects, the initial collection of statistics is usually sufficient. A subsequent collection is not usually needed, unless workload characteristics have changed dramatically.

In the next section, we will examine the changes introduced for the dbms_stats package.

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