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            How is auto scaling handled by the APM Insight agent?

            When applications are scaling up, a request for creating a new instance comes from the agent. Depending upon the license availability, the new instance may be scaled up for monitoring. 

            Let's say your license limit allows you to monitor 3 advanced monitors. The following table illustrates the various scenarios w.r.t autoscaling in APM Insight:

            Active instance
            DOWN instance
            Autoscale scenario
            All three instances are active.
            In this case, a new instance will not be spawned for autoscaling since your license limit is already consumed completely.
            Two instances are active
            One instance is marked as DOWN
            Here, a new instance is spawned by replacing the DOWN instance.
            One instance is active
            One instance is marked as DOWN
            A new instance will be spawned replacing the DOWN instance. After autoscaling, you can accomodate one more active instance in this scenario.

            Note: If there is no agent communication with your instance for more than ten minutes, the instance is marked as DOWN and it is freed up to accomodate a new instance. This process happens automatically when you enable autoscaling in APM Insight. 

            Updated: 18 Mar 2019 07:14 PM
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