Amazon Neptune
User Guide (API Version 2017-11-29)

Analyzing Neptune Query Execution Using SPARQL Explain

Amazon Neptune has added a SPARQL feature named explain. This feature is a self-service tool for understanding the execution approach taken by the Neptune engine. You invoke it by adding an explain parameter to an HTTP call that submits a SPARQL query.

The explain feature provides information about the logical structure of query execution plans. You can use this information to identify potential evaluation and execution bottlenecks. You can then use query hints to improve your query execution plans.