System Dump and Hang Analyze

System Dump (should be done 3 times with intervals of at least 1 min):

sqlplus "/ as sysdba"

oradebug setmypid

oradebug unlimit

oradebug dump systemstate 10

oradebug tracefile_name

exit;

Hanganalyze:

sqlplus "/ as sysdba"

oradebug setmypid

oradebug unlimit

oradebug hanganalyze 3

exit;