New Features in Oracle Database 10g Release 2
You can do online redefinition on clustered tables, MV logs, advanced queuing tables, and still preserve database statistics in Release 2. With this feature of preserving statistics, table analysis after reorganization is not needed, thereby improving the application availability. Also, the V$SQLSTATS view has been added to improve performance.
In previous Oracle releases, lock statistics would lock the statistics based on table usage in the application. This meant that you could not get to any statistics including table statistics, column statistics, histograms, and statistics on all the dependent indexes. Also, the database server provided the lock and unlock feature in the optimizer statistic area. ...
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