Real-time ADDM was introduced with Oracle 12c. This provides an innovative way to analyze the causes and problems when the Oracle database hangs or does not respond. The "Automatic Database Diagnostic Monitor (ADDM)" can be run in normal and diagnostic mode. Different results are achieved depending on the connection mode.
The following shows how the ADDM runs through a set of predefined criteria according to which the current performance of the database is analyzed. Once a problem has been identified and analyzed, the Real-Time ADDM uses the Emergency Monitoring feature to help find the causes and solutions.
Oracle Database 12c has many albania telegram screening automatic performance diagnostic recommendations. These include the Automatic Database Diagnostic Monitor (ADDM), the Real-Time ADDM and the Compare Period ADDM. The ADDM Problem Report shows problems identified during the analysis in the last hour and makes suggestions for solving them. The Spot ADDM is a new advisory that is automatically triggered when the database starts to have performance problems and tries to identify the cause of the problem. The result is saved in the Automatic Workload Repository (AWR). In Oracle 12c, data from Real-Time SQL Monitoring, Database Operations Monitoring and the Real-Time ADDM Reports are also saved in the database's AWR. This gives the administrator the opportunity to subsequently check the performance of the database query execution. With Real-Time SQL Monitoring, the performance of a specific SQL query can be examined over time.
The ADDM analyzes performance problems immediately after the event occurs. This saves time and resources because the ADDM reproduces the problem.