Book Image

PostgreSQL High Performance Cookbook

By : Chitij Chauhan, Dinesh Kumar
Book Image

PostgreSQL High Performance Cookbook

By: Chitij Chauhan, Dinesh Kumar

Overview of this book

PostgreSQL is one of the most powerful and easy to use database management systems. It has strong support from the community and is being actively developed with a new release every year. PostgreSQL supports the most advanced features included in SQL standards. It also provides NoSQL capabilities and very rich data types and extensions. All of this makes PostgreSQL a very attractive solution in software systems. If you run a database, you want it to perform well and you want to be able to secure it. As the world’s most advanced open source database, PostgreSQL has unique built-in ways to achieve these goals. This book will show you a multitude of ways to enhance your database’s performance and give you insights into measuring and optimizing a PostgreSQL database to achieve better performance. This book is your one-stop guide to elevate your PostgreSQL knowledge to the next level. First, you’ll get familiarized with essential developer/administrator concepts such as load balancing, connection pooling, and distributing connections to multiple nodes. Next, you will explore memory optimization techniques before exploring the security controls offered by PostgreSQL. Then, you will move on to the essential database/server monitoring and replication strategies with PostgreSQL. Finally, you will learn about query processing algorithms.
Table of Contents (19 chapters)
PostgreSQL High Performance Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Using the pg_upgrade utility for version upgrade


Here in this recipe, we are going to talk about upgrading a PostgreSQL cluster using pg_upgrade. We will cover the upgrading of the PostgreSQL version from 9.5 to 9.6.

Getting ready

The only prerequisite here is that an existing PostgreSQL cluster must be up and running. The required version here is PostgreSQL Version 9.6. These steps are carried out on a 64 bit CentOS machine.

How to do it...

Here are the steps to upgrade a PostgreSQL machine from version 9.5 to version 9.6 using the pg_upgrade utility:

  1. Take a full backup of the data directory using a filesystem dump, or use pg_dumpall to back up the data:

            cd  /opt/pgsql/9.5/ 
    
            tar -cvf data.tar data
    
  2. The next step would to be install the new version of PostgreSQL 9.6, as mentioned previously.

  3. Now that the new version of PostgreSQL is installed, we make the following configuration changes and then initialize the data directory for the new PostgreSQL Version 9.6 database:

      ...