You can find the full collection of his Postgres Administration Presentations on his personal site, including video recordings from major conferences like PGConf and FOSDEM.
Identifying time-consuming queries using tools like pg_stat_statements or pgBadger . The Life of a PostgreSQL Table, Part 2 with Bruce Momjian Mastering PostgreSQL Administration - Bruce Mom...
Understanding vacuuming operations, Write-Ahead Logs (WAL), and MVCC (Multi-Version Concurrency Control). You can find the full collection of his
For foundational concepts, his book PostgreSQL: Introduction and Concepts provides a detailed historical and technical overview of the system. Core Administration Topics Covered Write-Ahead Logs (WAL)