alter session set timed_statistics = true;
alter session set statistics_level=all;
alter session set max_dump_file_size = unlimited;
alter session set events '10046 trace name context forever,level 12';
<somt thing>
alter session set events '10046 trace name context off';

-------------

oradebug setospid X <--where X is the ospid
oradebug event 10046 trace name context forever, level 8
<wait 10 minutes>
oradebug event 10046 trace name context off
oradebug dump errorstack 3 <-- repeat 3 times, one after the other