Comprehensive Postgres observability: is your database healthy, and will it stay that way?
A Postgres database is one of the most complex pieces of software you run. It stores your data durably so a power loss doesn't lose a committed transaction. It hands out real transactions while thousands of queries fight over the same rows. It stays available when a node dies, lets you rewind to a point in time after someone drops the wrong table, and constantly tunes itself with background jobs. Two questions matter about all of that machinery: is it healthy right now, and will it stay healthy?