Nope: "updating" does what I described, if another request initiated an update and it's in progress, it will serve a stale value, but the request who triggered the update is still "hanging" until the cache is refreshed. So you get that annoying slowdown for at least 1 user (often the CEO of your client company).
The way to work around this issue with nginx (for simple endpoints) is to write scripts that will hit the endpoints to make sure the cache is always hot, but it's a sad, half working hack (the CEO can still hit that cold cache page himself, if lucky enough).
The way to work around this issue with nginx (for simple endpoints) is to write scripts that will hit the endpoints to make sure the cache is always hot, but it's a sad, half working hack (the CEO can still hit that cold cache page himself, if lucky enough).