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We just had some orphaned database connections (our bug) to a tenant and were able to find and kill them because of Erlang's observability:

https://gist.github.com/chasers/e4aa33625e6ea39ecb89f03383dd...

edit: link to gist

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Not possible in your typical Rails setup where remote console spawns a separate process so you can't inspect what's going on with your actual servers. Even if so, the amount of observability is not remotely (pun intended) close. You don't appreciate it until your production puma workers start going haywire and you have no idea why

You can attach to a running Ruby process with rbtrace easily.

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