Beginning Oracle Database 11g Administration From Novice to Professional

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CHAPTER 13 RECOVERY
LogMiner. Enable supplemental minimal logging to ensure that LogMiner has sufficient
information to support chained rows and various storage arrangements
such as cluster tables and index- organized tables.
base.
The commands , , and can be
used to easily recovery from any failure. The task can also be performed by using
Enterprise Manager.
command can be used to verify the usability of backups without harming the live
database. A standard operating procedure (SOP) for database recovery can be your
guide to handling this most stressful of database administration tasks.
Exercises
file, and then try to
open the database. Use Data Recovery Advisor to restore the missing file from
backups and to recover transactions from the redo logs. Confirm that the database
can now be opened for access.
Transaction depend on the availability of undo information in the undo segments.
Information is lost if it is overwritten by newer transactions. Undo retention is
governed by the parameter. Check the value of
in your database. Find out how to increase the value. Add data files to the
tablespace if you think it is not big enough to support this value. How would you
determine how much space is enough? Refer to the Oracle documentation and
find out how to guarantee the retention of undo information.
back
log stored in the flash recovery area. The amount of information retained
in the flashback logs is covered by the parameter.
Check the value of in your database. Find out how
to increase the value. Check the value of —it will tell you the
location of the flash recovery area, which is used to store backup copies as well as
flashback logs. Check the size of the flash recovery area; is it big enough? Check
the view and determine whether logging of flashback information is
enabled; if not, find out how to enable logging.