CONN sys/password AS SYSDBA;  -- User must have SYSDBA.

oradebug SETORAPNAME PR00     -- Debug process by name.
ORADEBUG SETMYPID;            -- Debug current session.
ORADEBUG SETOSPID 1234;       -- Debug session with the specified OS process.
ORADEBUG SETORAPID 123456;    -- Debug session with the specified Oracle process ID.

ORADEBUG TRACEFILE_NAME;      -- Display the current trace file.
oradebug UNLIMIT              -- Set trace to unlimited size.

-- Start SQL Trace
ORADEBUG EVENT 10046 TRACE NAME CONTEXT FOREVER, LEVEL 12;   
-- Stop SQL Trace
ORADEBUG EVENT 10046 TRACE NAME CONTEXT OFF;                 

-- Start Optimizer Trace
ORADEBUG EVENT 10046 TRACE NAME CONTEXT FOREVER, LEVEL 12;   

exec dbms_monitor.session_trace_enable (session_id=>123,serial_num=>123, waits=> TRUE, binds=> true );
exec dbms_monitor.session_trace_disable (session_id=>123,serial_num=>123);

-- Trace user's own session
exec dbms_monitor.session_trace_enable (NULL,NULL,TRUE,TRUE) ;
exec dbms_monitor.session_trace_disable ;

-- List Online patches
ORADEBUG patch list


--*************************************
-- Dump HangAnalyze on all RAC nodes.
--*************************************

sqlplus "/as sysdba"
oradebug setmypid
oradebug unlimit
oradebug -g all dump hanganalyze 3
oradebug -g all dump systemstate 258

<<wait for 1 mins>> 

oradebug -g all dump hanganalyze 3
oradebug -g all dump systemstate 258
oradebug tracefile_name 

<<wait for 1 mins>> 

oradebug -g all dump hanganalyze 3
oradebug -g all dump systemstate 258
oradebug tracefile_name