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Enabling Błock Change Tracking

Błock changing tracking improvcs thc performance of incremental backups by recording changed blocks in thc błock change tracking file. During an incremental mOracie Database Backup and Recovery User's Guide for information about other methods of configuring the retention policy

backup, instead of scanning all data blocks to identify which blocks have changcd, RMAN uses this file to identify thc changed blocks that necd to be backcd up.

You can cnable błock change tracking when the database is either open or mounted. This section assumes that you intend to create the błock change tracking filc as an Oracle Managed File in the database area, which is where the database maintains active database files such as data files, control files, and online redo log files.

To determine if błock change tracking is cnabled. check the STATUS and FILENAME columns in the V$BLOCK_CHANGE_TRACKING view, using the following statement from

the SQL or RMAN prompt:

SELECT status, filename FROM V$BLOCK CHANGE TRACKING;