I've read a bunch of the official documentation, and then read a lot of the source code to Postgres itself. I'd say source is the #1 place I go if I have quest

I've read a bunch of the official documentation, and then read a lot of the source code to Postgres itself. I'd say source is the #1 place I go if I have questions that are specific, and then if I want philosophy I look for previous presentations by the Postgres team, or from the hackers mailing list.