I have one app, but I see in my dashboard two machines…do I need both or should I delete one of them?
Two machines is usually better, as it will carry on running even if one region goes down, or one host fails. But some apps don’t work correctly with more than one machine; there are sometimes some machine-sync issues one has to watch out for.
Great, thanks. Also ended up matching the AI’s response pretty closely. I was concerned it increased costs, but guessing only slightly.
Yikes 
I recommend reading this page on app resiliency, which is the main reason to have two machines by default: App Availability and Resiliency · Fly Docs
It even covers autostop/start so you only run as many machines as actually needed for the number of requests you’re getting.
In order for autostop/autostart to work well, it’s crucial to tune your soft and hard limits, which is covered here: Load Balancing · Fly Docs
Cheers!
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