Managing the Online Redo Log - wykład

Managing the Online Redo Log
The online redo log files are a critical component in database recovery. Every
transaction in the database updates the redo logs, regardless of whether archiving is
enabled. During crash, instance, or media recovery, the database properly applies redo
log files in ascending order by using the log sequence number of the necessary
archived and redo log files.
If properly configured, the online redo logs require little maintenance. This section
describes the more common redo log management tasks. It contains the following
topics:
■ Multiplexing the Online Redo Log
■ Switching a Log File
... zobacz całą notatkę