I’m not seeing my apps machines scale down even though I have auto_stop_machines = “suspend” and a soft_limit set. Ive tested adjusting soft_limit to a high number and I am not seeing fly suspend my machines. From my analytics, should I be looking at App Concurrency to see what soft_limit should be…

I’d recommend reading Autostop/autostart Machines · Fly Docs

Thanks for the tip. I have read the docs and added the values that should cause the app to scale down and up as needed but it doesn’t appear to be working. Is there a way to see why its not scaling? Maybe a log?

If it’s not scaling down, then there’s something hitting your service to keep it alive. Usually it takes 7-10 minutes of idle before the fly proxy shuts down the machine.

Is there something I need to change to stop sending traffic to machines when not needed?

Isn’t that statement contradicting? If there’s traffic, then the machine is needed.

Right now I have 10 machines and they are all actively taking requests. From the dashboard, they are all around “700 App Concurrency”. Shouldn’t they autoscale down until the soft_limit is hit which is 8,000? Technically one server should be able to handle this in my scenario.

There was a recent bug w/ scaling, so maybe you’re affected by that. I’d wait a bit and see if that’s related. If not send an email to support.

[image] timl1: type = "connections" Is this intentional? Try changing it to requests.

[image] timl1: type = “connections” Yes I believe that is correct because I am using the proxy handler. handlers = ["proxy_proto"]

Was this bug shared? Where can I find more information?

Why is my App not Scaling Down?

Questions / Help

khuezy January 13, 2025, 6:52pm 14

but it’s the opposite problem you’re having.