I’ve been trying to get the newrelic python agent to work when using Tornado 5 (with UVLoop as well). When debugging my service and getting more into the agent code I saw that there is a new feature flag that is not documented anywhere. The flag is
tornado.instrumentation.r4, can you please share with us what is it for? I did enable it and it seems to be working better than
tornado.instrumentation.r3 with Tornado 5.