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Oracle Database 12c Backup and Recovery Survival Guide

You're reading from   Oracle Database 12c Backup and Recovery Survival Guide A comprehensive guide for every DBA to learn recovery and backup solutions

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Product type Paperback
Published in Sep 2013
Publisher Packt
ISBN-13 9781782171201
Length 440 pages
Edition 1st Edition
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Toc

Table of Contents (22) Chapters Close

Oracle Database 12c Backup and Recovery Survival Guide
Credits
About the Author
Acknowledgement
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
1. Understanding the Basics of Backup and Recovery 2. NOLOGGING Operations FREE CHAPTER 3. What is New in 12c 4. User-managed Backup and Recovery 5. Understanding RMAN and Simple Backups 6. Configuring and Recovering with RMAN 7. RMAN Reporting and Catalog Management 8. RMAN Troubleshooting and Tuning 9. Understanding Data Pump 10. Advanced Data Pump 11. OEM12c and SQL Developer Scenarios and Examples – A Hands-on Lab Index

Chapter 2. NOLOGGING Operations

You could be asking yourself why I want to talk about NOLOGGING operations in a backup and recovery book. The answer is simple: NOLOGGING operations will affect the recoverability of a database and due to this, it is very important for a DBA to understand this concept. It is the most visited topic on my blog www.oraclenz.org.

Many DBAs and developers use NOLOGGING operations when doing bulk inserts and massive deletion of data to reduce redo generation but many do not know that these statements will always generate redo, in other words, UPDATE or DELETE will always be logged. Later in this chapter, we will see some techniques that will reduce redo generation for massive updates and deletes.

In this chapter, we will cover the following topics:

  • LOGGING versus NOLOGGING

  • Disabling redo generation

  • NOLOGGING operations

  • How to reduce redo generation

  • Redo log wait events

  • Practice with some interesting scripts

NOLOGGING operations do not generate redo records in the redo log...

You have been reading a chapter from
Oracle Database 12c Backup and Recovery Survival Guide
Published in: Sep 2013
Publisher: Packt
ISBN-13: 9781782171201
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