Which version are you using?
$ sqlplus /
SQL*Plus: Release 10.2.0.2.0 - Production on Mon Sep 18 20:46:13 2006
Copyright (c) 1982, 2005, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> alter system set "_trace_files_public"=true;
alter system set "_trace_files_public"=true
*
ERROR at line 1:
ORA-02095: specified initialization parameter cannot be modified
SQL> alter system set "_trace_files_public"=true scope=spfile;
System altered.
SQL> Disconnected from Oracle Database 10g Enterprise Edition Release
10.2.0.2.0 - Production
With the Partitioning, OLAP and Data Mining options
$ stop_oracle
Processing Database instance "10G": log file
/oracle/product/10g/shutdown.log
$ start_oracle
Processing Database instance "10G": log file
/oracle/product/10g/startup.log
$
alter session set tracefile_identifier=DERYA;
Session altered.
SQL> alter session set events='10046 trace name context forever, level 12'
SQL> /
Session altered.
SQL> select * from 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
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
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
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
7902 FORD ANALYST 7566 03-DEC-81 3000
20
7934 MILLER CLERK 7782 23-JAN-82 1300
10
14 rows selected.
SQL> Disconnected from Oracle Database 10g Enterprise Edition Release
10.2.0.2.0 - Production
With the Partitioning, OLAP and Data Mining options
$ cd /oracle/product/10g/admin/oracle/udump/
$ ls
10g_ora_2919.trc 10g_ora_2790.trc 10g_ora_3315.trc 10g_ora_3126.trc
10g_ora_2946.trc 10g_ora_2823.trc 10g_ora_4252.trc 10g_ora_3153.trc
10g_ora_3195.trc 10g_ora_2832.trc 10g_ora_6286.trc 10g_ora_3301.trc
10g_ora_3044.trc 10g_ora_3173.trc 10g_ora_6330.trc 10g_ora_3436.trc
10g_ora_3072.trc 10g_ora_3224.trc 10g_ora_6593.trc 10g_ora_3463.trc
10g_ora_3274.trc 10g_ora_3227.trc 10g_ora_3114.trc 10g_ora_3464.trc
10g_ora_6356.trc 10g_ora_4956.trc 10g_ora_3141.trc 10g_ora_3554_DERYA.trc
10g_ora_6383.trc 10g_ora_3288.trc 10g_ora_3300.trc
And, finally:
$ ls -l 10g_ora_3554_DERYA.trc
-rw-r--r-- 1 501 220525 Sep 18 20:50 10g_ora_3554_DERYA.trc
As you can see, it's publicly readable.
--
Mladen Gogala
http://www.mgogala.com
