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)

How much disk space does a table use?

How big is a table? What is the total size of all the parts of a table?

How to do it...

We can see the size of a table by using this command:

postgres=# select pg_relation_size('pgbench_accounts');

The output of this command is as follows:

(1 row)

We can also see the total size of a table, including indexes and other related spaces, as follows:

postgres=# select pg_total_relation_size('pgbench_accounts');

The output is as follows:

(1 row)

We can also use a psql command, like this:

postgres=# \dt+ pgbench_accounts
List of relations...