Stop Adding Read Replicas. You’re Creating More Problems Than You’re Solving.
Adding a read replica feels like the obvious fix when your database is struggling under read load. But most teams reach for replicas as a premature optimization, trading one problem for three: consistency bugs, routing complexity, and operational debt. Before you bolt on a replica, you should be exhausting caching, query optimization, and index tuning. Replicas aren’t a shortcut β they’re a commitment.