Trace file not found

Question

using linux 5.7 (32bit) and oracle 11g relase 2
SQL> select name,value from v$diag_info;
NAME
VALUE
Diag Enabled
TRUE
ADR Base
/home/oracle/u01/app/oracle
ADR Home
/home/oracle/u01/app/oracle/diag/rdbms/looking4/looking4
NAME
VALUE
Diag Trace
/home/oracle/u01/app/oracle/diag/rdbms/looking4/looking4/trace
Diag Alert
/home/oracle/u01/app/oracle/diag/rdbms/looking4/looking4/alert
Diag Incident
/home/oracle/u01/app/oracle/diag/rdbms/looking4/looking4/incident
NAME
VALUE
Diag Cdump
/home/oracle/u01/app/oracle/diag/rdbms/looking4/looking4/cdump
Health Monitor
/home/oracle/u01/app/oracle/diag/rdbms/looking4/looking4/hm
Default Trace File
/home/oracle/u01/app/oracle/diag/rdbms/looking4/looking4/trace/looking4_ora_4327
.trc
NAME
VALUE
Active Problem Count
0
Active Incident Count
0
11 rows selected.
now when i check
ls -al looking4_ora_43*
-rwxrwxr-x 1 oracle oinstall 2960 Aug 22 09:59 looking4_ora_4300.trc
-rwxrwxr-x 1 oracle oinstall 182 Aug 22 09:59 looking4_ora_4300.trm
-rwxrwxr-x 1 oracle oinstall 2957 Aug 17 10:29 looking4_ora_4306.trc
-rwxrwxr-x 1 oracle oinstall 180 Aug 17 10:29 looking4_ora_4306.trm
-rw-r----- 1 oracle oinstall 2957 Aug 30 10:38 looking4_ora_4325.trc
-rw-r----- 1 oracle oinstall 181 Aug 30 10:38 looking4_ora_4325.trm
-rw-r----- 1 oracle oinstall 2956 Aug 24 15:56 looking4_ora_4380.trc
-rw-r----- 1 oracle oinstall 181 Aug 24 15:56 looking4_ora_4380.trm
-rwxrwxr-x 1 oracle oinstall 2942 Aug 14 10:18 looking4_ora_4394.trc
-rwxrwxr-x 1 oracle oinstall 178 Aug 14 10:18 looking4_ora_4394.trm
[oracle@unknown485b39d0b515 trace]$ pwd
/home/oracle/u01/app/oracle/diag/rdbms/looking4/looking4/trace
so where is
looking4_ora_4327??
thanks in advance

Answer 1

There is no trace file at your /home/oracle/u01/app/oracle/diag/rdbms/looking4/looking4/trace/looking4_ora_4327, because your current user's session is not being under tracing. See example below :
I logged in as scott user and below is the output :
SQL> column value for a50;
SQL> /
NAME                                                             VALUE
Diag Enabled                                                     TRUE
ADR Base                                                         e:\app\serverroom
ADR Home                                                         e:\app\serverroom\diag\rdbms\orcl\orcl
Diag Trace                                                       e:\app\serverroom\diag\rdbms\orcl\orcl\trace
Diag Alert                                                       e:\app\serverroom\diag\rdbms\orcl\orcl\alert
Diag Incident                                                    e:\app\serverroom\diag\rdbms\orcl\orcl\incident
Diag Cdump                                                       e:\app\serverroom\diag\rdbms\orcl\orcl\cdump
Health Monitor                                                   e:\app\serverroom\diag\rdbms\orcl\orcl\hm
Default Trace File                                               e:\app\serverroom\diag\rdbms\orcl\orcl\trace\orcl_
                                                                 ora_8056.trcIt means, if my session is being trace, then I have to check e:\app\serverroom\diag\rdbms\orcl\orcl\trace\orcl_ora_8056.trc file for this session right? Ok, what if I log out and re-connect :
NAME                                                             VALUE
Diag Enabled                                                     TRUE
ADR Base                                                         e:\app\serverroom
ADR Home                                                         e:\app\serverroom\diag\rdbms\orcl\orcl
Diag Trace                                                       e:\app\serverroom\diag\rdbms\orcl\orcl\trace
Diag Alert                                                       e:\app\serverroom\diag\rdbms\orcl\orcl\alert
Diag Incident                                                    e:\app\serverroom\diag\rdbms\orcl\orcl\incident
Diag Cdump                                                       e:\app\serverroom\diag\rdbms\orcl\orcl\cdump
Health Monitor                                                   e:\app\serverroom\diag\rdbms\orcl\orcl\hm
Default Trace File                                               e:\app\serverroom\diag\rdbms\orcl\orcl\trace\orcl_
                                                                 ora_8752.trcIt means, now I shall look into e:\app\serverroom\diag\rdbms\orcl\orcl\trace\orcl_ora_8752.trc for any tracing info; only if it is being trace see :
SQL> host dir e:\app\serverroom\diag\rdbms\orcl\orcl\trace\orcl_ora_8752.trc;
Volume in drive E is HCL_DISK3
Volume Serial Number is A62A-F491
Directory of e:\app\serverroom\diag\rdbms\orcl\orcl\trace
File Not Found
SQL> alter session set events '10046 trace name context forever,level 12';
Session altered.
SQL> host dir e:\app\serverroom\diag\rdbms\orcl\orcl\trace\orcl_ora_8752.trc;
Volume in drive E is HCL_DISK3
Volume Serial Number is A62A-F491
Directory of e:\app\serverroom\diag\rdbms\orcl\orcl\trace
30-08-2012  13:39                 0 orcl_ora_8752.trc
               1 File(s)              0 bytes
               0 Dir(s)  121,181,003,776 bytes free
SQL> alter session set events '10046 trace name context off';
Session altered.
SQL> host dir e:\app\serverroom\diag\rdbms\orcl\orcl\trace\orcl_ora_8752.trc;
Volume in drive E is HCL_DISK3
Volume Serial Number is A62A-F491
Directory of e:\app\serverroom\diag\rdbms\orcl\orcl\trace
30-08-2012  13:39                 0 orcl_ora_8752.trc
               1 File(s)              0 bytes
               0 Dir(s)  121,181,003,776 bytes free
SQL>So, in short, you will only get the trace file, if the current session is under tracing.
Regards
Girish Sharma