Mysql always seemed to be fast like a bike going downhill with no brakes.<p>Postgres has always taken a more &#x27;solid&#x27; approach.  One instance that made my jaw drop when I realized it: in the past (has this been fixed?), DDL (alter table, create table, etc...) were not transactional in Mysql.  You could get 50% through a series of them, and find your database 100% fucked up.<p>That said, over the years Mysql has been improving too, for sure.