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Oracle GoldenGate 11g Implementer's guide

You're reading from   Oracle GoldenGate 11g Implementer's guide Design, install, and configure high-performance data replication solutions using Oracle GoldenGate

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Product type Paperback
Published in Feb 2011
Publisher Packt
ISBN-13 9781849682008
Length 280 pages
Edition 1st Edition
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Author (1):
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John P Jeffries John P Jeffries
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John P Jeffries
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Table of Contents (21) Chapters Close

Oracle GoldenGate 11 Implementer's guide
Credits
Foreword
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Getting Started 2. Installing and Preparing GoldenGate FREE CHAPTER 3. Design Considerations 4. Configuring Oracle GoldenGate 5. Configuration Options 6. Configuring GoldenGate for HA 7. Advanced Configuration 8. Managing Oracle GoldenGate 9. Performance Tuning 10. Troubleshooting GoldenGate GGSCI Commands
GoldenGate Installed Components
The Future of Oracle GoldenGate
Index

Data compression


Oracle GoldenGate offers data compression at the network layer, enhancing data transfer rates. Once configured in the Extract or Data Pump process parameter file, the Server Collector process on the target machine automatically decompresses the data before writing to the remote trail files.

Compressing the Data Stream

Depending on your data, the maximum compression ratio can exceed 5:1, which will help transfer speeds on low bandwidth networks. However, additional CPU utilization is possible when compared to no data compression, which is the default.

If compression is enabled, the following statistics are available in the Extract process report, requested via the GGSCI SEND command with the GETTCPSTATS argument:

  • Compression CPU time: The time in seconds the process used the CPU resource.

  • Compress time: The overall time the compression tool takes including waits on CPU resource.

  • Uncompressed bytes and compressed bytes: Includes detail on the amount of compression taking place....

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