> PostgreSQL has a million such optimizations under its hood that make it happily chug away even when it’s getting slammed So does MySQL. Facebook, Google, and

> PostgreSQL has a million such optimizations under its hood that make it happily chug away even when it’s getting slammed So does MySQL. Facebook, Google, and Percona have contributed many upstream patches to harden and improve MySQL over the years. MySQL also has much better observability to find issues causing problems, from index_statistics to hunting down individual queries causing locks. I agree that Postgres is by far the better engineered product, but it's not necessarily the better RDBMS product because of that. MySQL is battle tested in a way that Postgres isn't (yet).