Step by Step Enable Archive Log in Oracle 12c

SQL> archive log list
Database log mode        No Archive Mode
Automatic archival        Disabled
Archive destination        USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence     244249
Current log sequence

SQL> select status from v$instance;

STATUS
------------
OPEN

SQL> show parameter db_name

NAME      TYPE VALUE
------------------------------------ ----------- ------------------------------
db_name      string miscdb
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance
ORACLE instance started.

Total System Global Area 1.0100E+10 bytes
Fixed Size     3721224 bytes
Variable Size 1778386936 bytes
Database Buffers 8287944704 bytes
Redo Buffers    29831168 bytes
Database mounted.
SQL>


Space Assign for Fast Recovery Area:

SQL> alter system set db_recovery_file_dest_size = 200G;

System altered.

Choose the destination:

SQL> alter system set db_recovery_file_dest='/u02/app/oracle/FRA/miscdb';

System altered.

SQL> ALTER DATABASE ARCHIVELOG;

Database altered.

SQL>

SQL> alter database open;

Database altered.

SQL> show parameter recovery

NAME      TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest      string /u02/app/oracle/FRA/miscdb
db_recovery_file_dest_size      big integer 200G
recovery_parallelism      integer 0
SQL>