# Autoscaling

The Knative Pod Autoscaler (KPA), provides fast, request-based autoscaling capabilities. To correctly configure autoscaling to zero for revisions, you must modify its paramenters.

`target` defines how many concurrent requests are wanted at a given time (soft limit) and is the recommended configuration for autoscaling in Knative.

The `minScale` and `maxScale` annotations can be used to configure the minimum and maximum number of pods that can serve applications.

You can access autoscaling capabilities by using `kn` to modify Knative services without editing YAML files directly.

Use the `service create` and `service update` commands with the appropriate flags to configure the autoscaling behavior.


 Flag | Description|
:------|:-----------|
| `--concurrency-limit int`| Hard limit of concurrent requests to be processed by a single replica.
| `--concurrency-target int`| Recommendation for when to scale up based on the concurrent number of incoming requests. Defaults to `--concurrency-limit`.
| `--max-scale int`| Maximum number of replicas.
| `--min-scale int`| Minimum number of replicas.