We were accidentally running the old monolithic Sidekiq service alongside the optimized and split ones, which means we were using double the RAM. This might have caused some 504 errors and slowdowns for users, and I apologize for that.
What I've learned today: It's best to clean up after yourself when making changes. Everything should be blazing fast again. The slowness was occasional, didn't affect all users, and lasted about a day.

Daniel Schildt
in reply to Rolle Laukkarinen • • •