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
Contributors
Preface
Index

Incremental/differential backup and restore


If you have performance problems with a backup of a large PostgreSQL database, then you may consider incremental or differential backups.

An incremental backup is a backup of all files that have changed since the last backup, either incremental or full. In order to restore a given incremental backup, you must restore the full backup and then all of the incremental backups in-between.

A differential backup is a backup of all individual changes since the last full backup. In order to restore a differential backup, you only need that backup and the full backup it refers to.

How to do it…

To perform a differential physical backup, you can use rsync to compare the existing files against the previous full backup and then overwrite only the changed data blocks. It's a bad plan to overwrite your last backup because, if the new backup fails, you are left without backups. Therefore, keep two or more copies. An example backup schedule is as follows:

Day of the...