Book Image

PostgreSQL 14 Administration Cookbook

By : Simon Riggs, Gianni Ciolli
5 (1)
Book Image

PostgreSQL 14 Administration Cookbook

5 (1)
By: Simon Riggs, Gianni Ciolli

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 14 allows you to scale up your PostgreSQL infrastructure. With this book, you'll take a step-by-step, recipe-based approach to effective PostgreSQL administration. This book will get you up and running with all the latest features of PostgreSQL 14 while helping you explore the entire database ecosystem. You’ll learn how to tackle a variety of problems and pain points you may face as a database administrator such as creating tables, managing views, improving performance, and securing your database. As you make progress, the book will draw attention to important topics such as monitoring roles, validating backups, regular maintenance, and recovery of your PostgreSQL 14 database. This will help you understand roles, ensuring high availability, concurrency, and replication. Along with updated recipes, this book touches upon important areas like using generated columns, TOAST compression, PostgreSQL on the cloud, and much more. By the end of this PostgreSQL book, you’ll have gained the knowledge you need to manage your PostgreSQL 14 database efficiently, both in the cloud and on-premise.
Table of Contents (14 chapters)

Preventing new connections

In certain emergencies, you may need to lock down the server completely, or just prevent specific users from accessing the database. It's hard to foresee all the situations where you may need to do this, so we will present a range of options.

How to do it…

Connections can be prevented in several ways, as follows:

  1. Pause and resume the session pool. See the Setting up a connection pool recipe, later in this chapter, on controlling connection pools.
  2. Stop the server! See the Stopping the server safely and quickly and the Stopping the server in an emergency recipes, though this is not recommended.
  3. Restrict the connections for a specific database to zero by setting the connection limit to 0:

This will limit normal users from connecting to that database, though it will still allow superuser connections.

  1. Restrict the connections for a...