Tracing Remote Session and tkprof

Methods to set Event 10046:
==========================
Method 1 :
syntax: exedc dbms_system.set_ev(l_sid,l_serial#,10046,l_level,'');
SQL > execute dbms_system.set_ev(10,224,10046,8,'');

Method 2:SQL> oradebug unlimit
SQL> oradebug setospid 10927
SQL> oradebug event 10046 trace name context forever, level 8                 ------- this is to turn on
SQL> oradebug event 10046 trace name context off                             

TKPROF:
tkprof clndv10_ora_21234002.trc clndv10_ora_21234002.txt table=system.plan_table explain=system/manager sys=no waits=yes sort=prsela, exeela, fchela
Note: in the tkprof sys=no means it won't show the sqls belongs to sys user.