Oracle Diagnostic Tools
ADDM Report
AWR Report
ASH Report
Enterprise Manager Cloud Control
SQL Tuning Advisor
SQL Access Advisor
Cluster Health Advisor
DBMS_XPLAN
Explain Plan
SQLT
System State Dump
Hang Analyze
OS Tools
OSWatcher
Top Activity
SQL Health Check
10053 Trace
10046 Trace
ORAchk & ExaCheck
TFA
DBSTAT
SQL Monitor Report
Data Dictionary Views
Sql Developer
Database Hang Manager