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PostgreSQL Administration Cookbook, 9.5/9.6 Edition

You're reading from   PostgreSQL Administration Cookbook, 9.5/9.6 Edition Effective database management for administrators

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Product type Paperback
Published in Apr 2017
Publisher
ISBN-13 9781785883187
Length 556 pages
Edition 3rd Edition
Languages
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Authors (4):
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Gianni Ciolli Gianni Ciolli
Author Profile Icon Gianni Ciolli
Gianni Ciolli
Hannu Krosing Hannu Krosing
Author Profile Icon Hannu Krosing
Hannu Krosing
Gabriele Bartolini Gabriele Bartolini
Author Profile Icon Gabriele Bartolini
Gabriele Bartolini
Simon Riggs Simon Riggs
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Simon Riggs
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Toc

Table of Contents (13) Chapters Close

Preface 1. First Steps FREE CHAPTER 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

Which parameters are at non-default settings?

Often, we need to check which parameters have been changed or whether our changes have correctly taken effect.

In the previous two recipes, we have seen that parameters can be changed in several ways, and with different scope. You learned how to inspect the value of one parameter or get the full list of parameters.

In this recipe, we will show you how to use SQL capabilities to list only those parameters whose value in the current session differs from the system-wide default value.

This list is valuable for several reasons. First, it includes only a few of the 200-plus available parameters, so it is more immediate. Also, it is difficult to remember all our past actions, especially in the middle of a long or complicated session.

Version 9.4 introduces the ALTER SYSTEM syntax, which we will describe in the next recipe, Updating the parameter...

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