Book Image

PostgreSQL 11 Administration Cookbook

By : Simon Riggs, Gianni Ciolli, Sudheer Kumar Meesala
Book Image

PostgreSQL 11 Administration Cookbook

By: Simon Riggs, Gianni Ciolli, Sudheer Kumar Meesala

Overview of this book

PostgreSQL is a powerful, open source database management system with an enviable reputation for high performance and stability. With many new features in its arsenal, PostgreSQL 11 allows you to scale up your PostgreSQL infrastructure. This book takes a step-by-step, recipe-based approach to effective PostgreSQL administration. The book will introduce you to new features such as logical replication, native table partitioning, additional query parallelism, and much more to help you to understand and control, crash recovery and plan backups. You will learn how to tackle a variety of problems and pain points for any database administrator such as creating tables, managing views, improving performance, and securing your database. As you make steady progress, the book will draw attention to important topics such as monitoring roles, backup, and recovery of your PostgreSQL 11 database to help you understand roles and produce a summary of log files, ensuring high availability, concurrency, and replication. By the end of this book, you will have the necessary knowledge to manage your PostgreSQL 11 database efficiently.
Table of Contents (19 chapters)
Title Page
Copyright and Credits
About Packt

What version is the server?

PostgreSQL has internal version numbers for the data file format, database catalog layout, and crash recovery format. Each of these is checked as the server runs to ensure that the data doesn't become corrupt. PostgreSQL doesn't change these internal formats for a single release; they only change across releases.

From a user's perspective, each release differs in terms of the way the server behaves. If you know your application well, then it should be possible to assess the differences simply by reading the release notes for each version. In many cases, a retest of the application is the safest thing to do.

If you experience any general problems related to setup and configuration with your database, then you'll need to double-check which version of the server you have. This will help you to report a fault or to consult the correct version of the manual.

How to do it…

We will find out the version by directly querying the database server:

  1. Connect to the database and...