Devil’s advocate: could it simply be that someone spent 5 months optimizing queries for MySQL before switching to Postgres? Such that Postgres performance isn’t “worse”, it just doesn’t plan queries in the same way that MySQL does.
It was definitely that. The queries were built to take advantage of MySQL features.I joined after they just switched and was told to optimize queries. Was a pretty toxic job, I was hired work on streaming media systems (like Hulu, ESPN, etc) but instead they had me doing query optimizations. I quit after 5 months. I was never able talk to my boss once, he avoided me and was always too busy.
