Additional debug instrumentation can be enabled for packages using the x/telemetry/counter package by setting GODEBUG=countertrace=1 in the environment. We should document this more prominently, at least at https://pkg.go.dev/golang.org/x/telemetry/counter.
This may also be worth mentioning in the documentation at https://pkg.go.dev/cmd/go.
CC @golang/telemetry
Comment From: gopherbot
Change https://go.dev/cl/597617 mentions this issue: counter: document GODEBUG=countertrace=1 in the counter package doc
Comment From: hyangah
I noticed many GODEBUG settings used in the go command, especially if they are purely for internal debugging purpose) are not documented from the cmd/go documentation. (cmdgonetlimit, fuzzdebug, goindex, ...). If there is no established guideline on what should be documented, I think cl/597617 is good enough.
Comment From: matloob
I agree with @hyangah. As I understand it, this isn't meant to be a user facing feature.
Comment From: findleyr
Indeed, Russ said the same thing. Then the above CL (for the counter package) is sufficient. Thanks!