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 the second part of the book I wrote in Japanese in 2012 (ISBN-13: 978-4774153926) which is composed of seven parts, and covers version 11 and earlier.

• Chapter 1. Database Cluster, Databases and Tables
• Chapter 2. Process and Memory Architecture
• Chapter 3. Query Processing
• Chapter 4. Foreign Data Wrappers (FDW) and Parallel Query
• Chapter 5. Concurrency Control
• Chapter 6. VACUUM Processing
• Chapter 7. Heap Only Tuple (HOT) and Index-Only Scans
• Chapter 8. Buffer Manager
• Chapter 9. Write Ahead Logging (WAL)
• Chapter 10. Base Backup and Point-In-Time Recovery (PITR)
• Chapter 11. Streaming Replication

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Hironobu SUZUKI

I graduated from graduate school of information engineering (M.S. in Information Engineering), have worked for several companies as a software developer and technical manager/director. I published seven books in the fields of database and system integration (3 PostgreSQL books and 3 MySQL books).

As a director of the Japan PostgreSQL Users Group (2010-2016), I organized the largest (non-commercial) technical seminar/lecture of PostgreSQL in Japan for more than six years, and also served as the program committee chair of the Japan PostgreSQL Conference in 2013 and as a member in 2008 and 2009.

Cuando era joven, vivió en Sudamérica por unos años. Recientemente, a veces vuelve a allí.

Now I live in Dublin, Ireland. However, I am considering to relocate to another country again because of financial reason and personal activity. The first reason is simple. Taxes and rent are higher than expected, becoming poorer than when living in Japan. The second reason is my personal PostgreSQL activity. In short, the company I am currenty working is a very bad environment to do open source activities. So, I have to look for a new company that welcomes my activity of PostgreSQL.

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