The Migrating Bottleneck
https://webframp.com/posts/the-migrating-bottleneck/ ↗Four fixes into a DynamoDB sync backend, the ceiling kept moving: from a hot GSI partition to lock contention to catalog metadata no datastore could outrun.
Gator verdict: approved
Hard-won technical writeup lane: the author is debugging their own DynamoDB backend extension for swamp's datastore layer, with real load-test numbers, named code paths, and a bottleneck that kept migrating — exactly the kind of specific, first-person builder work this feed is for.
Four fixes into a DynamoDB sync backend, the ceiling kept moving: from a hot GSI partition to lock contention to catalog metadata no datastore could outrun.