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PostgreSQL 11 Administration Cookbook

You're reading from   PostgreSQL 11 Administration Cookbook Over 175 recipes for database administrators to manage enterprise databases

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Product type Paperback
Published in May 2019
Publisher Packt
ISBN-13 9781789537581
Length 600 pages
Edition 1st Edition
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Concepts
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Authors (3):
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Gianni Ciolli Gianni Ciolli
Author Profile Icon Gianni Ciolli
Gianni Ciolli
Sudheer Kumar Meesala Sudheer Kumar Meesala
Author Profile Icon Sudheer Kumar Meesala
Sudheer Kumar Meesala
Simon Riggs Simon Riggs
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Simon Riggs
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Toc

Table of Contents (14) 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 13. Other Books You May Enjoy

Major upgrades in-place

PostgreSQL provides an additional supplied program, called pg_upgrade, which allows you to migrate between major releases, such as from 9.2 to 9.6; alternatively, you can upgrade straight to the latest server version. These upgrades are performed in-place, meaning that we upgrade our database without moving to a new system. That does sound good, but pg_upgrade has a few things that you may wish to consider as potential negatives, which are as follows:

  • The database server must be shut down while the upgrade takes place.
  • Your system must be large enough to hold two copies of the database server:
    old and new copies. If it's not, then you have to use the link option of pg_upgrade, or use the Major upgrades online recipe later. If you use the link option on pg_upgrade, then there is no pg_downgrade utility. The only option in that case is a restore...
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