No trace file in .../udump

Question

Hi,
DB 10.2.0.5
I enabled a session tarce by :
execute sys.dbms_system.set_sql_trace_in_session(267,21842,TRUE); (that's the J011 process)
and can see it in v$session:
SQL> select sid, serial#, sql_trace, sql_trace_waits, sql_trace_binds from v$session where sid=267;
SID SERIAL# SQL_TRAC SQL_T SQL_T
267 21842 ENABLED TRUE TRUE
but there is no trace file written to the udump dir?
br
Daniel

Answer 1

Daniel,
The dbms_system package is an undocumented , internal-only package. Please don't use it. Instead of it, use dbms_monitor package to do the same task.
edit
If you are still interested to use this package only , do some activity in the session. See below,
SQL> grant dba to aman identified by aman;
Grant succeeded.
SQL> cl scr
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
[oracle@edbar2p0-orcl ~]$ sqlplus aman/aman
SQL*Plus: Release 11.2.0.1.0 Production on Mon Jul 11 17:00:34 2011
Copyright (c) 1982, 2009, Oracle.  All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
SQL> select sid, serial# from V$session where username='AMAN';
       SID    SERIAL#
        31        353
SQL> execute sys.dbms_system.set_sql_trace_in_session(31,353,TRUE);
BEGIN sys.dbms_system.set_sql_trace_in_session(31,353,TRUE); END;
ERROR at line 1:
ORA-06550: line 1, column 7:
PLS-00201: identifier 'SYS.DBMS_SYSTEM' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
SQL> conn / as sysdba
Connected.
SQL> grant execute on dbms_system to aman;
Grant succeeded.
SQL> cl scr
SQL> conn aman/aman
Connected.
SQL> select sid, serial# from V$session where username='AMAN';
       SID    SERIAL#
        31        357
SQL> alter session set tracefile_identifier='aman';
Session altered.
SQL> execute sys.dbms_system.set_sql_trace_in_session(31,357,TRUE);
PL/SQL procedure successfully completed.
SQL> select sid, serial#, sql_trace, sql_trace_waits, sql_trace_binds from v$session where sid=31;
       SID    SERIAL# SQL_TRAC SQL_T SQL_T
        31        357 ENABLED  FALSE FALSEAfter this, I checked in the diag folder, there is no control file created.
[oracle@edbar2p0-orcl trace]$ ls *aman*
ls: *aman*: No such file or directory
[oracle@edbar2p0-orcl trace]$ Now, I just ran some queries in the session.
SQL> select * from scott.emp;
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM
    DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-80        800
        20
      7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300
        30
      7521 WARD       SALESMAN        7698 22-FEB-81       1250        500
        30
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM
    DEPTNO
      7566 JONES      MANAGER         7839 02-APR-81       2975
        20
      7654 MARTIN     SALESMAN        7698 28-SEP-81       1250       1400
        30
      7698 BLAKE      MANAGER         7839 01-MAY-81       2850
        30
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM
    DEPTNO
      7782 CLARK      MANAGER         7839 09-JUN-81       2450
        10
      7788 SCOTT      ANALYST         7566 19-APR-87       3000
        20
      7839 KING       PRESIDENT            17-NOV-81       5000
        10
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM
    DEPTNO
      7844 TURNER     SALESMAN        7698 08-SEP-81       1500          0
        30
      7876 ADAMS      CLERK           7788 23-MAY-87       1100
        20
      7900 JAMES      CLERK           7698 03-DEC-81        950
        30
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM
    DEPTNO
      7902 FORD       ANALYST         7566 03-DEC-81       3000
        20
      7934 MILLER     CLERK           7782 23-JAN-82       1300
        10
14 rows selected.After doing this, I checked again ,
[oracle@edbar2p0-orcl trace]$ ls *aman*
orcl_ora_9828_aman.trc  orcl_ora_9828_aman.trm
[oracle@edbar2p0-orcl trace]$
PARSING IN CURSOR #3 len=23 dep=0 uid=93 oct=3 lid=93 tim=1310404033551285 hv=52
404428 ad='32ab2004' sqlid='ggqns3c1jz86c'
select * from scott.emp
END OF STMT
PARSE #3:c=1000,e=1903,p=1,cr=24,cu=0,mis=1,r=0,dep=0,og=1,plh=3956160932,tim=13
10404033551284
EXEC #3:c=0,e=10,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,plh=3956160932,tim=131040403
3551335
FETCH #3:c=0,e=266,p=6,cr=7,cu=0,mis=0,r=1,dep=0,og=1,plh=3956160932,tim=1310404
033551649
FETCH #3:c=0,e=19,p=0,cr=1,cu=0,mis=0,r=13,dep=0,og=1,plh=3956160932,tim=1310404
033551860
STAT #3 id=1 cnt=14 pid=0 pos=1 obj=73181 op='TABLE ACCESS FULL EMP (cr=8 pr=6 p
w=0 time=0 us cost=3 size=532 card=14)'HTH
Aman....
Edited by: Aman.... on Jul 11, 2011 5:08 PM
added Edit