I have an App Insights which received telemetry data for multiple applications. I have enables sampling in order to reduce telemetry data ingestion. Does AI uses sampled data to render application map?

CodePudding user response：

Uhm, nice question. Please check this link, might help: https://docs.microsoft.com/en-us/azure/azure-monitor/app/app-map?tabs=net

This too: https://docs.microsoft.com/en-us/azure/azure-monitor/app/sampling

CodePudding user response：

Yes it does. It builds up the map based on a set of queries of the ingested data as explained in the docs:

The app map finds components by following HTTP dependency calls made between servers with the Application Insights SDK installed.

This experience starts with progressive discovery of the components. When you first load the Application Map, a set of queries is triggered to discover the components related to this component.

Data that is not ingested cannot be queried. Normally that won't be an issue: in a given timeframe some dependency telemetry should still be ingested so it could still build a map, but metrics like performance, fail rates & call rates might be less accurate.