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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

Improving queries

Once you understand what a query is doing, getting it to do something better can be a difficult road to walk down. There are some common techniques that mesh with the areas PostgreSQL is known to be good and bad at.

Note that your first steps to improve queries should be to check whether the statistics the optimizer is working with seem reasonable. If it's bad, you may fix the problem by rewriting the query you have today to improve things. But, you can expect that future queries will run into the same class of issue, so fixing that from a statistics standpoint is the preferred way, the one that's more likely to continue reflecting future trends in the data. But improving the statistics about your data only goes so far some days.

Optimizing for fully cached...

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