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Oracle Enterprise Manager Cloud Control 12c: Managing Data Center Chaos

You're reading from   Oracle Enterprise Manager Cloud Control 12c: Managing Data Center Chaos Take back control of your data center with this practical step-by-step tutorial to using Oracle Enterprise Manager. Real-life examples and case studies help you manage rationally rather than through day-to-day firefighting.

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Product type Paperback
Published in Dec 2012
Publisher Packt
ISBN-13 9781849684781
Length 394 pages
Edition 1st Edition
Languages
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Author (1):
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PORUS HOMI HAVEWALA PORUS HOMI HAVEWALA
Author Profile Icon PORUS HOMI HAVEWALA
PORUS HOMI HAVEWALA
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Table of Contents (19) Chapters Close

Oracle Enterprise Manager Cloud Control 12: Managing Data Center Chaos
Credits
About the Author
Acknowledgements
About the Reviewers
www.PacktPub.com
Preface
1. Chaos at Data Centers 2. Enter Oracle Cloud Control FREE CHAPTER 3. Ease the Chaos with Performance Management 4. Ease the Chaos with Configuration Management and Security Compliance 5. Ease the Chaos with Automated Provisioning 6. Ease the Chaos with Automated Patching 7. Ease the Chaos with Change Management 8. Ease the Chaos with Test Data Management 9. Ease the Chaos with Data Masking 10. Ease the Chaos with Exadata Management 11. Real-life Examples and Case Studies, and It's a Wrap: The Future is the Cloud Index

Laying the foundation


The foundation of the diagnostics capabilities is the built-in repository that is installed with every Oracle database (from version 10g onwards). This is known as the Automatic Workload Repository (AWR), and is stored in the SYSAUX Tablespace. Once every hour, by default, the database takes a snapshot of its workload and statistical information, and stores it in the AWR repository. This data is saved for 8 days by default.

Different classes of statistical data are stored: base statistics (such as physical reads), SQL statistics (such as reads per SQL statement), or different metrics (such as physical reads per second). Thus, historical information about the performance of the database is captured automatically, and the DBA does not have to set up any home-grown scripts or tables to do the capture, as in the past. The AWR is also self-managing and does not have to be micromanaged by the DBA. The space requirements are automatically managed; based on the retention interval...

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