This is the second installment of the "Timescale Timeout" series, a dev-to-dev talk about data-intensive applications. The first part covered the history of PostgreSQL, its evolution, use cases, and competitive advantages. Kirk Roybal, a fellow Timescale developer advocate, shared his insights on how PostgreSQL works under the hood and provided useful tips for users of all levels. This episode will be valuable for learning more about PostgreSQL and improving as a data-intensive application developer. The series aims to deliver such content directly to subscribers' inboxes through their newsletter.