Book Image

Learning PostgreSQL 10 - Second Edition

Book Image

Learning PostgreSQL 10 - Second Edition

Overview of this book

PostgreSQL is one of the most popular open source databases in the world, supporting the most advanced features included in SQL standards. This book will familiarize you with the latest features released in PostgreSQL 10. We’ll start with a thorough introduction to PostgreSQL and the new features introduced in PostgreSQL 10. We’ll cover the Data Definition Language (DDL) with an emphasis on PostgreSQL, and the common DDL commands supported by ANSI SQL. You’ll learn to create tables, define integrity constraints, build indexes, and set up views and other schema objects. Moving on, we’ll cover the concepts of Data Manipulation Language (DML) and PostgreSQL server-side programming capabilities using PL/pgSQL. We’ll also explore the NoSQL capabilities of PostgreSQL and connect to your PostgreSQL database to manipulate data objects. By the end of this book, you’ll have a thorough understanding of the basics of PostgreSQL 10 and will have the necessary skills to build efficient database solutions.
Table of Contents (23 chapters)
Title Page
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

PostgreSQL configuration tuning


PostgreSQL's default configuration values are not suitable for a production environment; several default values are often undersized. In developing PostgreSQL applications, it is a good idea to have a test system that is configured very closely to a production environment to get accurate performance measures. In any PostgreSQL environment, the following configuration should be reviewed.

Maximum number of connections

The maximum number of connections is an important parameter in configuring a database. Each client connection consumes memory, thus also affecting the total amount of memory that can be allocated for other purposes. The max_connections configuration parameter's default value is 100; lowering this value allows the database administrator to increase the work_mem setting. In general, it is good practice to use connection-pooling software to reduce the amount of memory used and increase performance, as killing and establishing a connection wastes time...