Upon pushing a new Rails 6.1 app to Heroku, we promptly started getting “High Response Time” alerts from Logentries:

... heroku router - - .... method=GET path="/cable" .... request_id=xxxxx ... connect=4ms service=61011ms ...

We noticed they were all for the url /cable which makes sense, since Actioncable keeps the channel open, so the service time keeps increasing.

I saw some online posts suggesting to disable the High Response Time alert, but a better way IMO is ot keep the alert, but omit that particular route.

In your Logentries dashboard, simply edit Tags&Alert > High Response Time > Pattern

from: (service > 5000)

to: (service > 5000) AND NOT (path cable)