How to enable or disable Oracle ARCHIVELOG Mode

How to enable or disable Oracle ARCHIVELOG Mode

How to enable or disable Oracle ARCHIVELOG Mode

1. Connect to the database as an administrator

C: \ Users \ Administrator> sqlplus sys/sys @ prjdb as sysdba

SQL * Plus: Release 11.2.0.1.0 Production on Tue Jun 17 23:50:55 2014

Copyright (c) 1982,201 0, Oracle. All rights reserved.

Connected:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0-64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

2. Check whether the current archive mode is archive or non-archive.

SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 228
Current log sequence 230

3. Shut down the database

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

4. Start the database to the mount status.

SQL> startup mount;
ORACLE instance started.

Total System Global Area 3423965184 bytes
Fixed Size 2180544 bytes
Variable Size 2013268544 bytes
Database Buffers 1392508928 bytes
Redo Buffers 16007168 bytes
Database mounted.

5. Start the archive Mode

SQL> alter database archivelog;

Database altered.

SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 228
Next log sequence to archive 230
Current log sequence 230

6. Start the database

SQL> alter database open;
Database altered.

7. Disable archive Mode

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

Total System Global Area 3423965184 bytes
Fixed Size 2180544 bytes
Variable Size 2013268544 bytes
Database Buffers 1392508928 bytes
Redo Buffers 16007168 bytes
Database mounted.
SQL> alter database noarchivelog;

Database altered.

SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 228
Current log sequence 230
SQL>

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