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Mastering PostgreSQL 15 - Fifth Edition

You're reading from Mastering PostgreSQL 15 - Fifth Edition

Product type Book

Published in Jan 2023

Publisher Packt

ISBN-13 9781803248349

Pages 522 pages

Edition 5th Edition

Languages

Concepts

Robotic Process Automation

Author (1):

Hans-Jürgen Schönig

Table of Contents (16) Chapters

Preface

1. Chapter 1: PostgreSQL 15 Overview

2. Chapter 2: Understanding Transactions and Locking

3. Chapter 3: Making Use of Indexes

4. Chapter 4: Handling Advanced SQL

5. Chapter 5: Log Files and System Statistics

6. Chapter 6: Optimizing Queries for Good Performance

7. Chapter 7: Writing Stored Procedures

8. Chapter 8: Managing PostgreSQL Security

9. Chapter 9: Handling Backup and Recovery

10. Chapter 10: Making Sense of Backups and Replication

11. Chapter 11: Deciding on Useful Extensions

12. Chapter 12: Troubleshooting PostgreSQL

13. Chapter 13: Migrating to PostgreSQL

14. Index

Why subscribe?

15. Other Books You May Enjoy

Setting up asynchronous replication

The idea behind streaming replication is simple. After an initial base backup, the secondary backup can connect to the master, fetch a transaction log in real time, and apply it. Transaction log replay is not a single operation anymore but rather a continuous process that is supposed to keep running for as long as a cluster exists.

Performing a basic setup

In this section, we will learn how to set up asynchronous replication quickly and easily. The goal is to set up a system that consists of two nodes.

Basically, most of the work has already been done for WAL archiving. However, to make it easy to understand, we will look at the entire process of setting up streaming because we cannot assume that WAL shipping is really already set up as needed.

The first thing to do is to go to the postgresql.conf file and adjust the following parameters:

wal_level = replica
max_wal_senders = 10     # or whatever value >...

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Authors (1)

Hans-Jürgen Schönig

Hans-Jürgen Schönig has 20 years' experience with PostgreSQL. He is the CEO of a PostgreSQL consulting and support company called CYBERTEC PostgreSQL International GmbH. It has successfully served countless customers around the globe. Before founding CYBERTEC PostgreSQL International GmbH in 2000, he worked as a database developer at a private research company that focused on the Austrian labor market, where he primarily worked on data mining and forecast models. He has also written several books about PostgreSQL.

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