In this document, the internals of PostgreSQL for database administrators and system developers are described.
PostgreSQL is an open source multi-purpose relational database system which is widely used throughout the world. It is one huge system with the integrated subsystems, each of which has a particular complex feature and works with each other cooperatively. Although understanding of the internal mechanism is crucial for both administration and integration using PostgreSQL, its hugeness and complexity prevent it. The main purposes of this document are to explain how each subsystem works, and to provide the whole picture of PostgreSQL.
This document is based on a part of the book I wrote in Japanese in 2012 (ISBN-13: 978-4774153926), and covers version 9.6 and earlier. Planning to be completed eleven chapters as a whole, for now, you can read eight translated chapters in below:
I suspend translating the remaining chapters for a while, because the features related to the remaining chapters are still being developed and are changing every day.
- Chapter 3 :Query processing
- Chapter 4: Foreign Data Wrapper (FDW)
- Chapter 7: HOT (Heap Only Tuple) and Index-Only Scan