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

Managing installed extensions

In the last two recipes, we showed you how to install external modules in PostgreSQL to augment its capabilities.

In this recipe, we will show you some more capabilities that are offered by the extension infrastructure.

How to do it…

The following are the steps to manage the extensions:

  1. First, we list all the available extensions:
postgres=# \x on
Expanded display is on.
postgres=# SELECT *
postgres-# FROM pg_available_extensions
postgres-# ORDER BY name;
-[ RECORD 1 ]-----+--------------------------------------------------
name              | adminpack
default_version   | 2.0
installed_version |
comment           | administrative functions for PostgreSQL
-[ RECORD 2 ]-----+--------------------------------------------------
name              | pg_stat statements
default_version   | 1.6
installed_version |
comment           | track execution statistics of all SQL statements executed

In particular, if the dblink extension is installed, then we see a record such...