OCA Oracle Database 11g Administration I Exam Guide (Exam 1Z0-052)

13 Database Maintenance

CERTIFICATION OBJECTIVES

13.01 Use and Manage Optimizer Statistics

13.02 Use and Manage the Automatic Workload Repository

13.03 Use the Advisory Framework

13.04 Manage Alerts and Thresholds

Two-Minute Drill

Self Test

Performance of SQL statements is critically dependent on statistics that the optimizer uses to design efficient execution plans. Collection of statistics can be manual or automatic. If, after gathering statistics, performance is still an issue, then various metrics can be used to drill down to the cause of ...