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PostgreSQL 10 Administration Cookbook

You're reading from   PostgreSQL 10 Administration Cookbook Over 165 effective recipes for database management and maintenance in PostgreSQL 10

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Product type Paperback
Published in May 2018
Publisher Packt
ISBN-13 9781788474924
Length 576 pages
Edition 4th Edition
Languages
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Authors (2):
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Gianni Ciolli Gianni Ciolli
Author Profile Icon Gianni Ciolli
Gianni Ciolli
Simon Riggs Simon Riggs
Author Profile Icon Simon Riggs
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

Speeding up queries without rewriting them

Often, you either can't or don't want to rewrite the query. However, you can still try and speed it up through any of the techniques discussed here.

How to do it...

By now, we assume that you've looked at various problems already, so the following are more advanced ideas for you to try.

Increasing work_mem

For queries involving large sorts or for join queries it may be useful to increase the amount of working memory that can be used for query execution. Try setting:

SET work_mem = '1TB';

Then, run EXPLAIN...

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