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PostgreSQL 10 High Performance

You're reading from   PostgreSQL 10 High Performance Expert techniques for query optimization, high availability, and efficient database maintenance

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Product type Paperback
Published in Apr 2018
Publisher Packt
ISBN-13 9781788474481
Length 508 pages
Edition 3rd Edition
Languages
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Author (1):
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Enrico Pirozzi Enrico Pirozzi
Author Profile Icon Enrico Pirozzi
Enrico Pirozzi
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Table of Contents (18) Chapters Close

Preface 1. PostgreSQL Versions FREE CHAPTER 2. Database Hardware 3. Database Hardware Benchmarking 4. Disk Setup 5. Memory for Database Caching 6. Server Configuration Tuning 7. Routine Maintenance 8. Database Benchmarking 9. Database Indexing 10. Query Optimization 11. Database Activity and Statistics 12. Monitoring and Trending 13. Pooling and Caching 14. Scaling with Replication 15. Partitioning Data 16. Avoiding Common Problems 17. Other Books You May Enjoy

Summary

A major goal of this chapter was not only to show you how a variety of queries execute, but to demonstrate through many examples how to set up a query testing playground for exploring that yourself.

You shouldn't just read this chapter. You should load the dellstore2 data into your system and experiment with the queries yourself. It is possible that sometimes the results you get using the explain analyze statement are different; this may depend on the version of PostgreSQL you have, or on the indexes that have been created on the database, or it may depend on whether the system tables are updated (Analyze, Autoanalyze and Create Index are the processes that update the system tables ). For example if you are on PostgreSQL >= 9.2 and you have a table with an index in the field test_field and execute something such as SELECT field1 from table where test_field= 1...

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