Identifying time-consuming queries using tools like pg_stat_statements or pgBadger . The Life of a PostgreSQL Table, Part 2 with Bruce Momjian

Starting and stopping the postmaster, and managing data directory structures.

For foundational concepts, his book PostgreSQL: Introduction and Concepts provides a detailed historical and technical overview of the system. Core Administration Topics Covered

Understanding vacuuming operations, Write-Ahead Logs (WAL), and MVCC (Multi-Version Concurrency Control).

Configuring pg_hba.conf and managing user access.

The official Mastering PostgreSQL Administration guide includes deep dives into installation, configuration, maintenance, monitoring, and recovery.