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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

Statistics views

In practice, a series of views that organize this data are how most people access the statistics collector's output. Reading the SQL source code to these views is quite informative for learning how they can be used. If you have a PostgreSQL source code tree, the file that creates these views is src/backend/catalog/system_views.sql; in an installed database binary tree, you'll find them at share/system_views.sql; and alternately you can download the source code at http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/system_views.sql.

A simple view from there that shows how these are commonly constructed is the pg_stat_bgwriter view introduced in version 8.3:

    CREATE VIEW pg_stat_bgwriter AS
        SELECT
            pg_stat_get_bgwriter_timed_checkpoints() AS checkpoints_timed,
            pg_stat_get_bgwriter_requested_checkpoints(...
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