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Recommended concurrency limits for a Rails app using websockets
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2
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15
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January 4, 2026
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Proxy cannot route HTTPS (443) despite passing health checks - no healthy instances found
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4
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22
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December 29, 2025
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Estimated downtime during deployments?
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2
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30
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December 24, 2025
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fly machines not auto stopping even when auto_stop_machines = ‘stop’
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7
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78
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December 21, 2025
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Suspend 4096MiB machines, or let us have 2 CPU 2048MiB perf machines
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3
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56
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December 16, 2025
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(Unmanaged) Postgres not reachable after app comes out of suspend
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1
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25
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December 15, 2025
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Metrics for number of machines?
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2
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33
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December 13, 2025
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Did fly.io autoscaling behavior changed at 2025-11-13 12:00 Z
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3
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103
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December 1, 2025
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Machine throttle monitoring
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5
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91
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November 30, 2025
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Machines freeze while health checks pass - “Can’t reach app” + webhook failures (AMS/EWR)
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2
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49
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November 20, 2025
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Auto start/stop with SSH
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2
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30
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November 26, 2025
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Autoscaling issues during peak traffic
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7
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93
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December 11, 2025
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The fly proxy waits for machines to become available even though there's more machines
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12
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103
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November 13, 2025
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Machine is stuck in the suspending state
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4
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64
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October 31, 2025
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Would a region-specific worker autoscaling setup work?
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7
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76
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October 27, 2025
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SIGKILL Reaped Child Processes during job on L40S VM
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13
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99
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October 23, 2025
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"could not wake up machine due to a timeout requesting from the machines API" after the app has already un-suspended
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3
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57
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October 23, 2025
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Uneven load distribution between identical Fly.io instances
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11
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79
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October 15, 2025
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Bluegreen deploys seem to break when machines are starting
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7
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121
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October 6, 2025
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Scaling based on CPU
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2
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42
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October 3, 2025
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ridiculously long times for starting suspended machines
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1
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66
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October 3, 2025
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App concurrency incorrectly calculated
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8
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100
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September 30, 2025
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Cold start and health check failures on deployed APIs [repost]
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4
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77
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December 11, 2025
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App suspended but not the Postgres attached to it
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13
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95
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September 19, 2025
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restarting machine slower than creating new machine?
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1
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46
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September 9, 2025
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Incorrect app concurrency metrics affecting Fly Proxy scaling
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10
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82
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August 18, 2025
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Feature Request: increase maximum `kill_timeout` to 1 hour
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9
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98
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August 16, 2025
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With two machines, one machine always starts automatically
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6
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87
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August 14, 2025
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Autoscaler destroys machines that are still processing work
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6
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67
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August 8, 2025
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Requests to a suspended machine are taking a long time
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9
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135
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August 5, 2025
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