FORCE LOGGINGモードの有効化（デフォルト無効）

SQL> select force_logging from v$database;

FORCE_LOGGING
---------------------------------------
NO

SQL>
SQL> exec rdsadmin.rdsadmin_util.force_logging(p_enable => true);

PL/SQL procedure successfully completed.

SQL>
SQL> select force_logging from v$database;

FORCE_LOGGING
---------------------------------------
YES

FORCE LOGGINGモードの無効化

SQL> exec rdsadmin.rdsadmin_util.force_logging(p_enable => false);

PL/SQL procedure successfully completed.

SQL>
SQL> select force_logging from v$database;

FORCE_LOGGING
---------------------------------------
NO

参考

Oracle DB インスタンスの一般的な DBA ログタスク