Set up your own DoH (DNS over HTTPS) service
Summary
This article is a detailed, hands-on exploration of PostgreSQL internals, covering the concept of a database cluster, OIDs, system catalogs, physical storage layouts, tablespaces, HEAP structure, TOAST, and on-disk page inspection. It includes practical SQL examples and demonstrates how data, indexes, and TOAST data are stored and accessed, aimed at readers seeking a deeper understanding of PostgreSQL internals.