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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

Product type Paperback

Published in Feb 2011

Publisher Packt

ISBN-13 9781849682008

Length 280 pages

Edition 1st Edition

Tools

GoldenGate

Concepts

Database Administration

Author (1):

John P Jeffries

View More author details

Table of Contents (21) Chapters

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

Troubleshooting tips

So you have configured your GoldenGate environment, maybe in its simplest form, having one source and one target database. But despite starting the Manager, Extract, and Replicat processes, data is not being replicated.

The easiest way to determine that data replication is not working is to execute row counts against a given source and its target table. Then drill into the GoldenGate processes to obtain their status and statistics.

The following paragraphs provide the necessary troubleshooting tips to enable a quick resolution to the most common issues.

Replication not working?

Start your troubleshooting at the source. We need to determine that the Extracts are processing data before looking at the other components in the data stream. Two methods exist to confirm throughput, which we have already discussed in Chapter 8, Managing Oracle GoldenGate and Chapter 9, Performance Tuning. These are the GGSCI SEND and STATS commands, demonstrated in the following examples:

GGSCI...

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Authors (1)

John P Jeffries

John P Jeffries

John P Jeffries has worked in many countries around the world, consulting on the Oracle technology. He is interested in different cultures and enjoys teaching others. At present, John lives and works in Singapore and is employed as a subject matter expert at a global bank, delivering enterprise-wide infrastructure design solutions, particularly in the database private cloud and data replication space. Since he wrote his first book, Oracle GoldenGate 11g Implementer's Guide, he has been heavily focused on leveraging Oracle's Fusion Middleware products (including GoldenGate) to address performance, data migration, and data delivery issues. With over 15 years of experience in Oracle, John has worked for a number of global organizations, such as BT, Siebel Systems, Dell, Thomson Reuters, and Oracle Corporation, to name a few. At Oracle, he worked in advanced customer services on key accounts as a senior principal consultant and became the UK data replication expert, often publishing articles on his own website (http://oracle11ggotchas.com/). John is an Oracle Certified Professional and a GoldenGate specialist. He gives presentations at ODTUG conferences and continues to share his real-life hands-on experience through his work. Known for his ability to provide robust, effective solutions and workarounds, John delivers his knowledge, tips, and tricks in his new book, Oracle GoldenGate 12c Implementer's Guide.

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