I'm a database software engineer and author who is a regular contributor to PostgreSQL for the firm Crunchy Data.

My books on PostgreSQL performance are occasionally used as sources on Wikipedia. As I write this I'm referenced on FUA: "Gregory Smith (2010). PostgreSQL 9.0: High Performance. Packt Publishing Ltd. p. 78. ISBN 978-1-84951-031-8." and occasionally I'll show up in ext4.

http://rxseo.net