The Couchbase team has been working on a feature called Response Time Observability (RTO) and we are looking for feedback from the Couchbase community!
The SDK team use an RFC process feature development, and if you want to read through this one you can see it here: https://github.com/couchbaselabs/sdk-rfcs/blob/master/rfc/0035-rto.md
We also have more technical how-to based documentation for each of the languages we support. e.g. .NET https://developer.couchbase.com/documentation/server/5.5/sdk/dotnet/threshold-logging.html
We would like to hear from you, so if you have any questions or suggestions just comment below.