location of trace file

exec DBMS_MONITOR.SESSION_TRACE_ENABLE(waits => TRUE, binds => TRUE);

select value from v$diag_info where name='Default Trace File';

select u_dump.value || '/' || instance.value || '_ora_' || v$process.spid
|| nvl2(v$process.traceid, '_' || v$process.traceid, null ) || '.trc' "Trace File"
from V$PARAMETER u_dump
cross join V$PARAMETER instance
cross join V$PROCESS
join V$SESSION on v$process.addr = V$SESSION.paddr
where u_dump.name = 'user_dump_dest'
and instance.name = 'instance_name'
and V$SESSION.audsid=sys_context('userenv','sessionid');


exec DBMS_MONITOR.SESSION_TRACE_DISABLE;