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Oracle Database 11gR2 Performance Tuning Cookbook

You're reading from   Oracle Database 11gR2 Performance Tuning Cookbook Shifting your Oracle Database into top gear takes a lot of know-how and fine-tuning ability. The 80+ recipes in this Cookbook will give you those skills along with the ability to troubleshoot if things starts running slowly.

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Product type Paperback
Published in Jan 2012
Publisher Packt
ISBN-13 9781849682602
Length 542 pages
Edition 1st Edition
Languages
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Author (1):
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Ciro Fiorillo Ciro Fiorillo
Author Profile Icon Ciro Fiorillo
Ciro Fiorillo
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Table of Contents (21) Chapters Close

Oracle Database 11gR2 Performance Tuning Cookbook
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
1. Starting with Performance Tuning FREE CHAPTER 2. Optimizing Application Design 3. Optimizing Storage Structures 4. Optimizing SQL Code 5. Optimizing Sort Operations 6. Optimizing PL/SQL Code 7. Improving the Oracle Optimizer 8. Other Optimizations 9. Tuning Memory 10. Tuning I/O 11. Tuning Contention Dynamic Performance Views A Summary of Oracle Packages Used for Performance Tuning Index

V$LOG_HISTORY


This view shows the log history from the control file.

Fields

The most relevant view fields are:

  • RECID: The control file record ID

  • STAMP: The control file record stamp

  • THREAD#: The thread number of the archived log

  • SEQUENCE#: The sequence number of the archived log

  • FIRST_CHANGE#: The lowest system change number in the log

  • FIRST_TIME: The time of the first entry in the log

  • NEXT_CHANGE#: The highest system change number in the log

  • RESETLOGS_CHANGE#: The resetlogs change number of the database when the log was written

  • RESETLOGS_TIME: The resetlogs time of the database when the log was written

See also

  • The V$LOG and V$LOGFILE sections in this appendix

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