One possible log setting that you can make is activating or deactivating redo log management. Redo log management is activated by default.
Deactivate redo log management only in special cases, and then only for a fixed period of time.
When you deactivate redo log management, the log writer no longer writes any redo log entries to the log areas. This interrupts the log backup history, which means you have no log entries available for this period if you want to recover the database. In rare cases, it may be a good idea to deactivate redo log management, for example, when you initialize a database instance.
1. Transfer the database instance to the operational state ADMIN.
2. To activate or deactivate redo log management, you can use, for example, the Database Manager GUI, as described under Changing Log Settings.
3. If you deactivate redo log management, and then reactivate it, you must then make a complete data backup.