New Features for DBA’s

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Scripts: Tracing Sessions

Different methods of tracing sessions in Oracle for all versions

Using ORADEBUG

Using DTRUSS/Strace (depends on the needs)

Numerous ways of enabling trace in sqlplus

-- All versions.
<code>

SQL> ALTER SESSION SET sql_trace=TRUE;
SQL> ALTER SESSION SET sql_trace=FALSE;
SQL> EXEC DBMS_SESSION.set_sql_trace(sql_trace => TRUE);
SQL> EXEC DBMS_SESSION.set_sql_trace(sql_trace => FALSE);

SQL> ALTER SESSION SET EVENTS '10046 trace name context forever, level 8';
SQL> ALTER SESSION SET EVENTS '10046 trace name context off';

SQL> EXEC DBMS_SYSTEM.set_sql_trace_in_session(sid=>123, serial#=>1234, sql_trace=>TRUE);
SQL> EXEC DBMS_SYSTEM.set_sql_trace_in_session(sid=>123, serial#=>1234, sql_trace=>FALSE);

SQL> EXEC DBMS_SYSTEM.set_ev(si=>123, se=>1234, ev=>10046, le=>8, nm=>' ');
SQL> EXEC DBMS_SYSTEM.set_ev(si=>123, se=>1234, ev=>10046, le=>0, nm=>' ');


SQL> CONN sys/password AS SYSDBA;  -- User must have SYSDBA.
SQL> ORADEBUG SETMYPID;            -- Debug current session.
SQL> ORADEBUG SETOSPID 1234;       -- Debug session with the specified OS process.
SQL> ORADEBUG SETORAPID 123456;    -- Debug session with the specified Oracle process ID.

SQL> ORADEBUG EVENT 10046 TRACE NAME CONTEXT FOREVER, LEVEL 12;
SQL> ORADEBUG TRACEFILE_NAME;      -- Display the current trace file.
SQL> ORADEBUG EVENT 10046 TRACE NAME CONTEXT OFF;
-- All versions, requires DBMS_SUPPORT package to be loaded.
SQL> EXEC DBMS_SUPPORT.start_trace(waits=>TRUE, binds=>FALSE);
SQL> EXEC DBMS_SUPPORT.stop_trace;
SQL> EXEC DBMS_SUPPORT.start_trace_in_session(sid=>123, serial=>1234, waits=>TRUE, binds=>FALSE);
SQL> EXEC DBMS_SUPPORT.stop_trace_in_session(sid=>123, serial=>1234);

-- Oracle 10g
SQL> EXEC DBMS_MONITOR.session_trace_enable;

SQL> EXEC DBMS_MONITOR.session_trace_enable(waits=>TRUE, binds=>FALSE);

SQL> EXEC DBMS_MONITOR.session_trace_disable;

SQL> EXEC DBMS_MONITOR.session_trace_enable(session_id=>1234, serial_num=>1234);

SQL> EXEC DBMS_MONITOR.session_trace_enable(session_id =>1234, serial_num=>1234, waits=>TRUE, binds=>FALSE);

SQL> EXEC DBMS_MONITOR.session_trace_disable(session_id=>1234, serial_num=>1234);

SQL> EXEC DBMS_MONITOR.client_id_trace_enable(client_id=>'tim_hall');

SQL> EXEC DBMS_MONITOR.client_id_trace_enable(client_id=>'tim_hall', waits=>TRUE, binds=>FALSE);

SQL> EXEC DBMS_MONITOR.client_id_trace_disable(client_id=>'tim_hall');

SQL> EXEC DBMS_MONITOR.serv_mod_act_trace_enable(service_name=>'db10g', module_name=>'test_api', action_name=>'running');

SQL> EXEC DBMS_MONITOR.serv_mod_act_trace_enable(service_name=>'db10g', module_name=>'test_api', action_name=>'running', -
> waits=>TRUE, binds=>FALSE);

SQL> EXEC DBMS_MONITOR.serv_mod_act_trace_disable(service_name=>'db10g', module_name=>'test_api', action_name=>'running');

Oracle 11g:-

SQL> alter session set events ‘sql_trace {process : pid = <pid>, pname = <pname>, orapid = <orapid>} rest of event specification’

pid: v$process pid

pname: name of process

orapid: V$process spid

To set specific sql ID

SQL> alter session set events ‘sql_trace [sql:abcdhehe2v9s1]’;

SQL> alter session set events ‘sql_trace [sql:abcdhehe2v9s1] off’;

SQL> execute DBMS_SQLDIAG.DUMP_TRACE(p_sql_id=>’cjk13xfm8ybh7′,p_child_number=>0, p_component=>’Compiler’, p_file_id=>’TEST’);

</code>