oracle query trace

1. first of all need to find session id if you use any tool loke toad or sqldeveloper

SELECT * FROM v$session

2. connect oracle by console

sqlplus '/as sysdba'
                                                                                sessionid  , serial
execute sys.dbms_system.set_sql_trace_in_session(1151,29373,true);

find recently maed using
ls -ltr

tkprof filename.trc customname.txt explain=user/pw sys=no

ex)tkprof neosns_ora_7274.trc t1.txt explain=neo_sns/neo_sns_dba sys=no

execute sys.dbms_system.set_sql_trace_in_session(1151,29373,false);