Oracle ADDM Report
It analysis AWR report to identify potential performance bottle neck.
For each identified issue, it locates the root cause and provides recommendations.
It is created and stored every time AWR report is run provided STATISTICS_LEVEL parameter is set to TYPICAL or ALL.
To create ADDM Report
Sample output of ADDM report:
FINDING: 59% impact (944 seconds)
The buffer cache was undersized causing significant additional read I/O.
RECOMMENDATION 1: DB Configuration, 59% benefit (944 seconds)
ACTION: Increase SGA target size by increasing the value of parameter “sga_target” by 28 M.
SYMPTOMS THAT LED TO THE FINDING:
Wait class User I/O was consuming significant database time. (83% impact [1336 seconds])