I'm a frontend engineer who is learning Postgres and realized I couldn't hold the mental models in my head. So I built interactive visualizations for the concepts I found hardest to internalize.

15 episodes covering: pages and tuples, WAL, buffer cache, MVCC (why UPDATE doesn't block reads), B-tree traversal, query planning, isolation levels, lock queues, VACUUM, XID wraparound, connection pooling, replication, partitioning, and sharding.