[ORACLE] Restricted Mode, Quiesced State

Open Database in Restricted Mode
SQL> startup restrict;
SQL> alter system enable restricted session;
SQL> alter system disable restricted session;
SQL> select logins from v$instance;



Placing a Database into a Quiesced State
SQL> ALTER SYSTEM QUIESCE RESTRICTED;
SQL> ALTER SYSTEM UNQUIESCE;
SQL> select ACTIVE_STATE from V$INSTANCE ;