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

Which parameters are at non-default settings?

Often, we need to check which parameters have been changed, or whether our changes have taken effect correctly.

In the previous two recipes, we have seen that parameters can be changed in several ways, and with different scopes. You learned how to inspect the value of one parameter or get the full list of parameters.

In this recipe, we will show you how to use SQL capabilities to list only those parameters whose value in the current session differs from the system-wide default value.

This list is valuable for several reasons. First, it includes only a few of the 200+ available parameters, so it is more immediate. Also, it is difficult to remember all our past actions, especially in the middle of a long or complicated session.

PostgreSQL also supports the ALTER SYSTEM syntax, which we will describe in the next recipe, Updating the parameter file. From the viewpoint of this recipe, the behavior of this syntax is quite different compared to the other...