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)

Stopping the server in an emergency

If nothing else is working, we may need to stop the server quickly, without caring about disconnecting the clients gently.

Break the glass in case of emergency!

How to do it...

  1. The basic command to perform an emergency stop on the server is the following:
pg_ctl -D datadir stop -m immediate
  1. On Debian/Ubuntu, you can also use:
pg_ctlcluster 10 main stop -m immediate

As mentioned in the previous recipe, this is just a wrapper around pg_ctl. From this example, we can see that it can pass through the -m immediate option.

In the previous recipe, we have seen examples where the systemctl command was used to stop a server safely; however, that command cannot be used to perform an emergency...