The application router provides performance statistics in an HTTP response header if the HTTP request contains an HTTP query parameter (URL parameter) sap-statistics=true or if the HTTP request contains an HTTP header field sap-statistics:true.
If an HTTP request that contains a header field or query parameter with sap-statistics=true reaches the application router, the application router forwards an sap-statistics header to the corresponding backend. If SAP statistics is implemented for the backend, the backend returns to the application router a response header containing the statistics information from the backend.
The application router returns the following statistics information in an sap-statistics response header:
-
total: The time that has passed between the moment when the request entered into the application router and the moment when the application router started writing the response -
ext(in case of destination forwarding): The time spent in the backend
Each backend sub-component can add its own response header with duration measurements when it receives the HTTP header sap-statistics:true.