You have recently collected statistics on certain objects of a schema in your database. But
you observe suboptimal execution plans for the queries on these objects after two days of
statistics collection. The optimizer statistics retention period is set to its default value. Which
action would help to use the previous set of statistics on the objects?
A.
Reduce the optimizer statistics retention period by 2 days.
B.
Set the OPTIMIZER_PENDING_STATISTICS parameter to TRUE.
C.
Restore statistics from statistics history.
D.
Reduce the Automatic Workload Repository (AWR) retention period by 2 days.
C