1.Re-run the Oracle User Wizard (File | Oracle User Wizard) to install Predictive Diagnostics.
2.Ensure you set the correct Oracle Parameters for Predictive Diagnostics to collect the data it needs:
Without the proper access to Oracle data, Predictive Diagnostics cannot make its projections on the behavior of Oracle databases. To ensure its access to Oracle data, set the correct values for these Oracle parameters.
db_cache_advice Set this parameter to ON.
If this value is not set, Predictive Diagnostics cannot collect data on memory utilization.
statistics_level Set this parameter to TYPICAL or ALL.
If statistics_level is set to BASIC, Predictive Diagnostics cannot collect data on disk latency, disk throughput, active sessions, or memory.
timed_statistics Set this parameter to TRUE.
If timed_statistics is set to FALSE, Predictive Diagnostics cannot collect data on disk latency or disk throughput.