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PostgreSQL Administration Cookbook, 9.5/9.6 Edition - Third Edition

You're reading from PostgreSQL Administration Cookbook, 9.5/9.6 Edition - Third Edition

Product type Book

Published in Apr 2017

Publisher

ISBN-13 9781785883187

Pages 556 pages

Edition 3rd Edition

Languages

Concepts

Database Administration

Table of Contents (13) Chapters

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

Knowing whether anybody is using a specific table

This recipe helps you when you are in doubt whether some obscure table is used any more or it is left over from the past and just takes up space.

Getting ready

Make sure that you are a superuser, or at least have full rights to the table in question.

How to do it...

To see whether a table is currently in active use (that is, whether anyone is using it while you are watching it), run the following query on the database you plan to inspect:

CREATE TEMPORARY TABLE tmp_stat_user_tables AS
       SELECT * FROM pg_stat_user_tables...

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