--Provision New Relic add-on from Heroku's dashboard
$ heroku addons: create newrelic: wayne when done from the command line
At this point,
Create a New Relic account and
Set various environment variables are done automatically.
--Click New Relic from the add-on list screen to move to the New Relic site
$ heroku addons: open newrelic when done from the command line
Set according to the displayed screen
configdirectory (the license key for NEW_RELIC is written directly, so it is better to put it in an environment variable)
You should be able to go back to the Heroku add-ons list screen and click on the New Relic add-ons to go to the performance monitoring dashboard-like screen.
--The old document says "Set the app name in the environment variable", but it's OK (because it is written in the configuration file) --I accidentally wrote a gem in the development group and it got stuck for over an hour. .. .. --The New Relic account and email address are set to the email addresses registered on Heroku. Since the password is unknown, I selected Reset Password from the login screen and reset it.