Read Replicas Promised Scale. They Also Gave You Stale Data.

You added a read replica to take pressure off the primary. Reads got faster, the primary stopped sweating, everyone was happy — until a user updated their profile, hit refresh, and saw the old value stare back at them. Or an order flipped to "paid" in the admin panel while the customer-facing page still said "pending" for ten seconds. None of that... Weiterlesen