Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
PostgreSQL 10 Administration Cookbook

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

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

Using parallel query

PostgreSQL 10 now has an increasingly effective parallel query feature.

Response times from long running queries can be improved by the use of parallel processing. The concept is that we divide a large task up into multiple smaller pieces. We get the answer faster, but we use more resources to do that.

Very short queries won't get faster by using parallel query, so if you have lots of those you'll gain more by thinking about better indexing strategies. Parallel Query is aimed at making very large tasks faster, so it is useful for reporting and business intelligence queries.

How to do it...

Take a query that needs to do a big chunk of work, such as this:

\timing
SELECT count(*) FROM accounts;
count...
lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image