Reading the internals of Postgres: Database cluster, databases, and tables (buraksen.dev)

I've always wondered what happens at the deeper levels of a DB beyond just SQL-literacy. The memory-management tricks (pages, overflows, pointers and remains techniques etc.) is always a great reminder of low-level abstractions I am blessed to not worry about. True programming seems to lie in the OS...

Postgres design is very complex at first look, but very greatly designed and meaningful, I very like the way they support table-spaces. Good reading!