Present value
SQL> show parameter control_management_pack_access
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
control_management_pack_access string DIAGNOSTIC+TUNING
SQL>
SQL>
SQL>
SQL> SELECT count(*) FROM V$ACTIVE_SESSION_HISTORY;
COUNT(*)
----------
2974
Disable control_management_pack_access
SQL> ALTER SYSTEM SET control_management_pack_access=NONE;
System altered.
SQL>
SQL> show parameter control_management_pack_access
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
control_management_pack_access string NONE
SQL>
SQL> SELECT count(*) FROM V$ACTIVE_SESSION_HISTORY;
COUNT(*)
----------
0 <-----
SQL>
http://www.br8dba.com/control_management_pack_access/