Call for Oracle support & training (800) 766-1884
Free Oracle Tips

Corporate Oracle Training
Custom Oracle Training
Oracle New Features Training
Advanced Oracle DBA Classes
Oracle Tuning Courses
Oracle Tips & Tricks
Oracle Training Links
Oracle Training Links
Oracle Training Links

We are top for USA Oracle Training Clients


Free Oracle Tips


Free Oracle App Server Tips


Oracle support

Oracle training

Oracle tuning


Remote Oracle

Custom Oracle Training


  Oracle Tips by Burleson

Easy Oracle Automation
Chapter 5 -
Automatic Storage Management

Automatic Undo Management

Oracle Database 10g remembers optimal undo settings to avoid repeated ramp ups and performance problems during instance restart, database migration, and switching the undo tablespace. After a system restart or an undo tablespace switch, Oracle Database 10g decides how many undo segments to place online based on existing data stored in the AWR.

The Undo Advisor analyzes the undo usage. In AUM mode, the advisor suggests optimal undo tablespace size to support the longest running queries. If AUM is not used, it suggests undo tablespace size for a given retention period and the retention period for a given undo tablespace size.

Resumable space allocation, introduced in Oracle 9i, is for all tablespaces at the session level. Database operations are suspended when an out-of-space condition is encountered. These suspended operations automatically resume when the error condition disappears. In Oracle Database 10g, this can be enabled at the instance level. Besides this improvement, automatic alert notification is sent when an operation is suspended.

This feature can be enabled by the SQL command.

(Substitute 3600 for 1 hour)

The above text is an excerpt from:

Easy Oracle Automation
Oracle10g Automatic Storage, Memory and Diagnostic Features

ISBN 0-9745993-6-0

by Dr. Arun Kumar R.

Download your Oracle scripts now:

The definitive Oracle Script collection for every Oracle professional DBA


Oracle performance tuning book



Oracle performance tuning software

Oracle performance tuning software
Oracle performance Tuning 10g reference poster
Oracle training in Linux commands
Oracle training Excel


email BC:

Copyright © 1996 -  2014 by Burleson Inc. All rights reserved.

Oracle® is the registered trademark of Oracle Corporation.