How To Enable Trace In Oracle
1. Enable trace at instance level
Put the following line in init.ora. It will enable trace for all sessions and the background
processes
sql_trace = TRUE
to disable trace:
sql_trace = FALSE
- or -
to enable tracing without restarting database run the following command in sqlplus
SQLPLUS> ALTER SYSTEM SET trace_enabled = TRUE;
to stop trace run:
SQLPLUS> ALTER SYSTEM SET trace_enabled = FALSE;
2. Enable trace at session level
to start trace:
ALTER SESSION SET sql_trace = TRUE;
to stop trace:
ALTER SESSION SET sql_trace = FALSE;
- or -
EXECUTE dbms_session.set_sql_trace (TRUE);
EXECUTE dbms_session.set_sql_trace (FALSE);
- or -
EXECUTE dbms_support.start_trace;
EXECUTE dbms_support.stop_trace;
3. Enable trace in another session
Find out SID and SERIAL# from v$session. For example:
SELECT * FROM v$session WHERE osuser = OSUSER;
to start trace:
EXECUTE dbms_support.start_trace_in_session (SID, SERIAL#);
to stop trace:
EXECUTE dbms_support.stop_trace_in_session (SID, SERIAL#);
- or -
EXECUTE dbms_system.set_sql_trace_in_session (SID, SERIAL#, TRUE);
EXECUTE dbms_system.set_sql_trace_in_session (SID, SERIAL#, FALSE);
SQL> select sid, serial# from v$session where username = 'USER';
SQL> alter system kill session 'SID,SERIAL#';
1. Enable trace at instance level
Put the following line in init.ora. It will enable trace for all sessions and the background
processes
sql_trace = TRUE
to disable trace:
sql_trace = FALSE
- or -
to enable tracing without restarting database run the following command in sqlplus
SQLPLUS> ALTER SYSTEM SET trace_enabled = TRUE;
to stop trace run:
SQLPLUS> ALTER SYSTEM SET trace_enabled = FALSE;
2. Enable trace at session level
to start trace:
ALTER SESSION SET sql_trace = TRUE;
to stop trace:
ALTER SESSION SET sql_trace = FALSE;
- or -
EXECUTE dbms_session.set_sql_trace (TRUE);
EXECUTE dbms_session.set_sql_trace (FALSE);
- or -
EXECUTE dbms_support.start_trace;
EXECUTE dbms_support.stop_trace;
3. Enable trace in another session
Find out SID and SERIAL# from v$session. For example:
SELECT * FROM v$session WHERE osuser = OSUSER;
to start trace:
EXECUTE dbms_support.start_trace_in_session (SID, SERIAL#);
to stop trace:
EXECUTE dbms_support.stop_trace_in_session (SID, SERIAL#);
- or -
EXECUTE dbms_system.set_sql_trace_in_session (SID, SERIAL#, TRUE);
EXECUTE dbms_system.set_sql_trace_in_session (SID, SERIAL#, FALSE);
SQL> select sid, serial# from v$session where username = 'USER';
SQL> alter system kill session 'SID,SERIAL#';
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