Difference between type = "requests" and type = "connections" in services.concurrency?

[greg]

The requests type would be applicable to apps using the http handler. But you can still use the connections type, even for those.

A single connection could support multiple requests.

So which to use would depend on which type is more appropriate for your app and what causes its load.

Check this answer from Jerome for more detail (talking about Elixir but the same idea applies to other apps):

Recommended `services.concurrency` settings for Elixir/Phoenix apps?

Unfortunately, the answer is: it depends. A basic Phoenix app that doesn’t hit the database and return a static string could probably handle tens of thousands of concurrent connections. While an app that does a lot of writes or big operations may only be able to handle 5. You’re not wrong. The limits are very low for most use cases. You should be able to handle at least a few hundreds concurrency connections. You can play with the concurrency settings and see how it affects performance and lo…