Alert showing:
Errors in file /oracle/diag/rdbms/mydb/mydb/trace/mydb_smon_6024.trc (incident=9666): ORA-00600: internal error code, arguments: [ktecgetsh-inc], [2], [], [], [], [], [], [], [], [], [], []
This is a non-fatal internal error happenned while SMON is doing a temporary segment drop. My SMON encountered 9 out of maximum 100 non-fatal internal errors.
So,
alter system set event="10061 trace name context forever, level 10" scope=spfile;
Restart Database and:
alter system reset event scope=both sid='*';
See ya!
Matheus.