With APM Insight, you can monitor your applications hosted in cloud environments. In general, when an application auto scales, new APM instances gets added automatically (depending on your license limit). But when your application scales down, it still consumes your APM Insight license. 

In such cases, APM Insight auto scaling comes in handy. Whenever your application scales up, APM Insight checks for any DOWN instances. If there are any, it suspends that monitor and adds the new instance without consuming an additional license. This ensures your monitoring license is not wasted on DOWN instances. 

Learn how to enable auto scaling in APM Insight. 

Related article: K-Base