Oracle Tips by Burleson

Oracle 10g Changes to dbms_stats package

With Oracle Database 10g, there are some new arguments available for the dbms_stats package subprograms. Those parameters are as follows:

• granularity
   

• degree

granularity

This parameter is used in subprograms such as gather_table_stats and gather_schema_stats. This parameter indicates the granularity of the statistics that you want to collect, particularly for partitioned tables. As an example, you can gather the global statistics on a partitioned table, or you can gather global and partition-level statistics. It has two options. They are: AUTO and GLOBAL AND PARTITION.

When the AUTO option is specified, the procedure determines the granularity based on the partitioning type. Oracle collects global, partition-level, and sub-partition level statistics if sub-partition method is LIST. For other partitioned tables, only the global and partition level statistics are generated.

When the GLOBAL AND PARTITION option is specified, Oracle gathers the global and partition level statistics. No sub-partition level statistics are gathered even it is composite partitioned object.

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The above text is an excerpt from "Oracle Database 10g New Features: Oracle10g Reference for Advanced Tuning and Administration", by Rampant TechPress.  Written by top Oracle experts, this book has a complete online code deport with ready to use scripts. 

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