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PostgreSQL 11 Administration Cookbook

You're reading from PostgreSQL 11 Administration Cookbook

Product type Book

Published in May 2019

Publisher Packt

ISBN-13 9781789537581

Pages 600 pages

Edition 1st Edition

Languages

Concepts

Authors (3):

Simon Riggs

Gianni Ciolli

Sudheer Kumar Meesala

View More author details

Table of Contents (19) Chapters

Title Page

Copyright and Credits

About Packt

Contributors

Preface

1. First Steps

2. Exploring the Database

3. Configuration

4. Server Control

5. Tables and Data

6. Security

7. Database Administration

8. Monitoring and Diagnosis

9. Regular Maintenance

10. Performance and Concurrency

11. Backup and Recovery

12. Replication and Upgrades

1. Other Books You May Enjoy

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Index

Locating the database's system identifier

Each database server has a system identifier assigned when the database is initialized (created). The server identifier remains the same if the server is backed up, cloned, and so on.

Many actions on the server are keyed to the system identifier, and you may be asked to provide this information when you report a fault.

In this recipe, you will learn how to display the system identifier.

Getting ready

You need to connect as the Postgres OS user, or another user with execute privileges on the server software.

How to do it…

In order to display the system identifier, we just need to launch the following command:

pg_controldata <data-directory> | grep "system identifier"
Database system identifier:           5558338346489861223

Note that the preceding syntax will not work on Debian or Ubuntu systems, for the same reasons explained for initdb in the Locating the database server files recipe. However, in this case, there is no postgresql-common alternative...

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Authors (3)

Simon Riggs

Simon Riggs is a Major Developer of PostgreSQL since 2004. Formerly, Simon was the Founder and CEO of 2ndQuadrant, acquired by EDB in 2020. Simon has contributed widely to PostgreSQL, initiating new projects, contributing ideas, committing many important features as well and working directly with database architects and users on advanced solutions

See other products by Simon Riggs

Gianni Ciolli

Gianni Ciolli is Vice President and Field CTO at EDB; he was Global Head of Professional Services at 2ndQuadrant until it was acquired by EDB. Gianni has been a PostgreSQL consultant, trainer, and speaker at many PostgreSQL conferences in Europe and abroad over more than 10 years. He has a PhD in Mathematics from the University of Florence. He has worked with free and Open-Source software since the 1990s and is active in the community. He lives between Frankfurt and London and plays the piano in his spare time

See other products by Gianni Ciolli

Sudheer Kumar Meesala

Sudheer Kumar Meesala is a lead architect at Endurance International Group and has spent the last few years designing and building scalable and secure web applications within finance and internet industries. A large part of his job has included decomposing monolithic legacy applications into microservices. This has required a deep understanding of PostgreSQL, Cassandra, and other NoSQL databases. Other key areas of interest are container orchestration, DevOps, and more. He is also an accomplished speaker and trainer. He lives in Bangalore, India, and spends far too much time in traffic jams.

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