Database locking can be a bit surprising at times. I recently stumbled over CREATE TABLE IF NOT EXISTS causing client timeouts - you might expect this to be nea

Database locking can be a bit surprising at times. I recently stumbled over CREATE TABLE IF NOT EXISTS causing client timeouts - you might expect this to be near-instantaneous if the table exists, and it usually is, until it's not... because it always acquires an exclusive table lock, so it's blocked even by readers.