获得帮助信息
SQL> oradebug help
或者
SQL> oradebug help [command]
比如：
SQL> oradebug help setmypid
SETMYPID Debug current process
SQL语句跟踪（SQL statement tracing）
SQL> oradebug setmypid
Statement processed.
SQL> oradebug event 10046 trace name context forever, level 4
Statement processed.
SQL> select * from v$option where parameter = ‘Real Application Clusters’;
PARAMETER VALUE
—————————————- —–
Real Application Clusters TRUE
SQL> oradebug tracefile_name
/ee/oracle/rac/admin/orcldb/udump/orcldb1_ora_2011322.trc
SQL> oradebug close_trace
Statement processed.
错误堆栈转储（Error stack dumping）
SQL> oradebug setmypid
Statement processed.
SQL> oradebug event 942 trace name errorstack level 3
Statement processed.
SQL> select * from abc;
select * from abc
*
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> oradebug tracefile_name
/ee/oracle/rac/admin/orcldb/udump/orcldb1_ora_1253470.trc
SQL> oradebug close_trace
Statement processed.