Can't tell atm. if a timeout forces a node to become offline but 60s is still along time to wait (and decide) without actually knowing if a node is overloaded (it might be just busy which does not always mean overloaded).

There are tools for fi. edge routers which polls a status page to decide to change routing or not, in your case you first need to determine what exactly the conditions are for a node to be slow and then design a way to detect this, then you can look for tooling to automate whatever you want happening.

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nginx for Windows http://nginx-win.ecsds.eu/