Monitoring the Erlang VM With AppSignal's Magic Dashboard
blog.appsignal.com
blog.appsignal.com
I also highly recommend looking into spans and tracing (if you use multiple languages together), then you can use something like spandex with elixir and other languages to do tracing across languages. It's excellent with datadog.
It's so good to see so many improvements/cool features in Elixir/Erlang ecosystem.
I especially like their request-based pricing model. It makes it a no brainer to put it on every rails/elixir project under one account (per paying customer).
Disclaimer: they have sent me a box of delicious cookies for creating an open source plugin (ember deploy plugin for automatically uploading source maps to AppSignal). But I have liked them way before that :)
AppSignal's monitoring shows useful metrics but does not allow examining the supervisor tree and other things possible with Observer and other OTP tooling. In some sense, it's not a live debugging tool but a monitoring dashboard.
Fun fact -- Ian (maintainer) is/was a backend dev at Square Enix.