Book Image

PostgreSQL 10 Administration Cookbook - Fourth Edition

By : Simon Riggs, Gianni Ciolli
Book Image

PostgreSQL 10 Administration Cookbook - Fourth Edition

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 10 allows users to scale up their PostgreSQL infrastructure. This book takes a step-by-step, recipe-based approach to effective PostgreSQL administration. Throughout this book, you will be introduced to these new features such as logical replication, native table partitioning, additional query parallelism, and much more. You will learn how to tackle a variety of problems that are basically the pain points for any database administrator - from creating tables to managing views, from improving performance to securing your database. More importantly, the book pays special attention to topics such as monitoring roles, backup, and recovery of your PostgreSQL 10 database, ensuring high availability, concurrency, and replication. By the end of this book, you will know everything you need to know to be the go-to PostgreSQL expert in your organization.
Table of Contents (14 chapters)

Changing parameters in your programs

PostgreSQL allows you to set some parameter settings for each session or transaction.

How to do it...

  1. You can change the value of a setting during your session, like this:
SET work_mem = '16MB';
  1. This value will then be used for every future transaction. You can also change it only for the duration of the current transaction:
SET LOCAL work_mem = '16MB';
  1. The setting will last until you issue this command:
RESET work_mem;
  1. Alternatively, you can issue the following command:
RESET ALL;

The SET and RESET commands are SQL commands that can be issued from any interface. They apply only to PostgreSQL server parameters, but this does not mean that they affect the entire...