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

Reloading server configuration


In this recipe, we will talk about the command that can be used to reload the server configuration and its parameters.

Getting ready

If any of the server parameters come into effect after reloading the server configuration files, such as postgresql.conf, then we need to reload the server configuration using the reload option of the pg_ctl command.

How to do it...

We can use the following command to reload the server configuration on Red Hat-based Linux and Unix distributions:

pg_ctl -D /var/lib/pgsql/9.6/data reload

You can also reload the configuration using the pg_reload_conf function while still being connected to PostgreSQL .The usage of the pg_reload_conf function is mentioned as follows:

postgres=# select pg_reload_conf();

How it works...

The reload mode of the pg_ctl command is used to send the postgres process a SIGHUP signal, which in turn causes it to reload its configuration files such as postgresql.conf and pg_hba.conf. The benefit of this mode is that...