Use
This section describes how BRCONNECT deletes damaging statistics for the cost-based optimizer of the Oracle database.
Pool and cluster tables and tables that have the
ACTIVE flag set to N or R in the DBSTATC control table should not normally have statistics, since such statistics can negatively affect database performance.Activities
In the standard update statistics run, using
brconnect -f stats -t all , BRCONNECT checks whether such damaging statistics exist and deletes them if so.You can delete such damaging statistics immediately:
brconnect -u / -c -f stats -d
To delete statistics for other tables as well (only for test purposes), you can use the option
-f allsel :brconnect -u / -c -f stats -t sdbah,sdbad -d -f allsel