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PostgreSQL 14 Administration Cookbook

You're reading from   PostgreSQL 14 Administration Cookbook Over 175 proven recipes for database administrators to manage enterprise databases effectively

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Product type Paperback
Published in Mar 2022
Publisher Packt
ISBN-13 9781803248974
Length 608 pages
Edition 1st Edition
Concepts
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Authors (2):
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Gianni Ciolli Gianni Ciolli
Author Profile Icon Gianni Ciolli
Gianni Ciolli
Simon Riggs Simon Riggs
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Simon Riggs
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Table of Contents (14) Chapters Close

Preface 1. Chapter 1: First Steps 2. Chapter 2: Exploring the Database FREE CHAPTER 3. Chapter 3: Server Configuration 4. Chapter 4: Server Control 5. Chapter 5: Tables and Data 6. Chapter 6: Security 7. Chapter 7: Database Administration 8. Chapter 8: Monitoring and Diagnosis 9. Chapter 9: Regular Maintenance 10. Chapter 10: Performance and Concurrency 11. Chapter 11: Backup and Recovery 12. Chapter 12: Replication and Upgrades 13. Other Books You May Enjoy

Monitoring replication

Monitoring the status and progress of your replication is essential. We'll start by looking at the server status and then query the progress of replication.

Getting ready

You'll need to start by checking the state of your server(s).

Check whether a server is up using pg_isready or another program that uses the PQping() application programming interface (API) call. You'll get one of the following responses:

  • PQPING_OK (return code 0): The server is running and appears to be accepting connections.
  • PQPING_REJECT (return code 1): The server is running but is in a state that disallows connections (start up, shutdown, or crash recovery) or a standby that is not enabled with Hot Standby.
  • PQPING_NO_RESPONSE (return code 2): The server could not be contacted. This might indicate that the server is not running, there is something wrong with the given connection parameters (for example, wrong port number), or there is a network...
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