Disable Archive Log

Check Status and Parameters.

Shutdown and startup mount (!Caution).

 [oracle@orcl ~]$ sqlplus / as sysdba

 SQL> shutdown immediate;
 Database closed.
 Database dismounted.
 ORACLE instance shut down.
 SQL> startup mount
 ORACLE instance started.

 Total System Global Area 1577055400 bytes
 Fixed Size                  9135272 bytes
 Variable Size             939524096 bytes
 Database Buffers          620756992 bytes
 Redo Buffers                7639040 bytes
 Database mounted.
 SQL>

Disable archivelog:

 SQL> alter database noarchivelog;

 Database altered.

Open database:

 SQL> alter database open;

 Database altered.