# Auto-Scaling
To enable auto-scaling you need to go to the checkbox autoscaling:
The way that auto-scaling works is in conjunction with Max Concurrent requests that is set:
**Max Concurrent Requests**: This is the number of requests per replica that after the number set will begin rejecting requests. The trade off with setting a higher number can be higher latency but a lower number rejecting the requests.
**Target Concurrent Requests:** This is the number of concurrent requests that trigger autoscaling of another replica. This should be set below the Max Concurrent requests.
**Smoothing Factor:** This is the moving average of concurrent requests and how long you the amount of target requests coming in before a new replica is brought up or scaled down.
* Conservative: Responds to changes slowly
* Moderate: Balanced responsiveness
* Aggressive: Quickly react to change
**Auto Scaling Range for Replicas:** This is the minimum to maximum amount of replicas the system will put as the base line and the max it will go up to.
**Note:** Whatever options you have set for hardware selection will be used for autoscaling.
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