DBMS_MONITOR usage and trace file is empty

Question

NLSRTL      11.2.0.3.0     Production
Oracle Database 11g Enterprise Edition      11.2.0.3.0     64bit Production
PL/SQL      11.2.0.3.0     Production
TNS for IBM/AIX RISC System/6000:      11.2.0.3.0     Production
I want to trace a block of PL/SQL code by using the package DBMS_MONITOR.
And I do it this way:
ALTER SESSION SET TRACEFILE_IDENTIFIER = 'ET2';
DECLARE
   <some delarations>
BEGIN
   DBMS_MONITOR.SESSION_TRACE_ENABLE(waits => TRUE, binds => TRUE);
   <some selects and updates are running here>
   DBMS_MONITOR.SESSION_TRACE_DISABLE;
END;
COMMIT;Then I locate the trace file by running this query:
select u_dump.value || '/' || instance.value || '_ora_' || v$process.spid || nvl2(v$process.traceid, '_' || v$process.traceid, null ) || '.trc'"Trace File"
from V$PARAMETER u_dump
cross join V$PARAMETER instance
cross join V$PROCESS
join V$SESSION on v$process.addr = V$SESSION.paddr
where u_dump.name = 'user_dump_dest'
and instance.name = 'instance_name'
and V$SESSION.audsid=sys_context('userenv','sessionid');This gives me the path: /ORACLE/DBDEV/dump/diag/rdbms/dbdev/DBDEV/trace/DBDEV_ora_30277668_ET2.trc
Then I go to the file and what I see in it is just two rows which look like this:
Trace file /ORACLE/DBDEV/dump/diag/rdbms/dbdev/DBDEV/trace/DBDEV_ora_30277668_ET2.trc
CLOSE #4574493152:c=1,e=1,dep=1,type=3,tim=57812311082909And it is the same no matter how many times I run the block.
Please, help me understand what do I miss to make the DBMS_MONITOR package generate tracing information.
Thank you

Answer 1

It works for me
SQL> ALTER SESSION SET TRACEFILE_IDENTIFIER = 'ET2';
Session altered.
SQL> exec DBMS_MONITOR.SESSION_TRACE_ENABLE(waits => TRUE, binds => TRUE);
PL/SQL procedure successfully completed.
SQL> select value from v$diag_info where name='Default Trace File';
VALUE
/u01/app/oracle/diag/rdbms/sales/sales/trace/sales_ora_11754_ET2.trc
SQL> select ename from scott.emp;
ENAME
SMITH
ALLEN
WARD
JONES
MARTIN
BLAKE
CLARK
SCOTT
KING
TURNER
ADAMS
ENAME
JAMES
FORD
MILLER
14 rows selected.
SQL> exec DBMS_MONITOR.SESSION_TRACE_DISABLE;
PL/SQL procedure successfully completed.
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real Application Testing options
[oracle@node1 ~]$ tail -30 /u01/app/oracle/diag/rdbms/sales/sales/trace/sales_ora_11754_ET2.trc
FETCH #1:c=3000,e=17735,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,plh=1636480816,tim=1359129991410263
STAT #1 id=1 cnt=1 pid=0 pos=1 obj=0 op='FIXED TABLE FULL X$DIAG_INFO (cr=0 pr=0 pw=0 time=0 us cost=0 size=305 card=1)'
WAIT #1: nam='SQL*Net message to client' ela= 3 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=1359129991410526
*** 2013-01-25 21:36:36.162
WAIT #1: nam='SQL*Net message from client' ela= 4752240 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=1359129996162871
CLOSE #1:c=0,e=58,dep=0,type=0,tim=1359129996163090
=====================
PARSING IN CURSOR #1 len=27 dep=0 uid=0 oct=3 lid=0 tim=1359129996163357 hv=2660398526 ad='725a16e0' sqlid='5nwx8yqg94xdy'
select ename from scott.emp
END OF STMT
PARSE #1:c=0,e=177,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,plh=3956160932,tim=1359129996163354
EXEC #1:c=0,e=49,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,plh=3956160932,tim=1359129996163651
WAIT #1: nam='SQL*Net message to client' ela= 3 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=1359129996163714
WAIT #1: nam='Disk file operations I/O' ela= 76 FileOperation=2 fileno=4 filetype=2 obj#=-1 tim=1359129996163938
FETCH #1:c=0,e=644,p=0,cr=7,cu=0,mis=0,r=1,dep=0,og=1,plh=3956160932,tim=1359129996164409
WAIT #1: nam='SQL*Net message from client' ela= 246 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=1359129996164737
WAIT #1: nam='SQL*Net message to client' ela= 2 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=1359129996164827
FETCH #1:c=0,e=72,p=0,cr=1,cu=0,mis=0,r=13,dep=0,og=1,plh=3956160932,tim=1359129996164880
STAT #1 id=1 cnt=14 pid=0 pos=1 obj=73201 op='TABLE ACCESS FULL EMP (cr=8 pr=0 pw=0 time=0 us cost=3 size=84 card=14)'
*** 2013-01-25 21:36:41.591
WAIT #1: nam='SQL*Net message from client' ela= 5426334 driver id=1650815232 #bytes=1 p3=0 obj#=-1 tim=1359130001591408
CLOSE #1:c=0,e=46,dep=0,type=0,tim=1359130001591630
=====================
PARSING IN CURSOR #1 len=48 dep=0 uid=0 oct=47 lid=0 tim=1359130001592054 hv=3127860446 ad='6ce47f80' sqlid='80u1a4kx6yr6y'
BEGIN DBMS_MONITOR.SESSION_TRACE_DISABLE; END;
END OF STMT
PARSE #1:c=0,e=347,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,plh=0,tim=1359130001592052
EXEC #1:c=1999,e=1105,p=0,cr=0,cu=0,mis=0,r=1,dep=0,og=1,plh=0,tim=1359130001593421Edited by: Karan on Jan 25, 2013 9:38 PM