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h1. What is the GraphDB’s Explain Plan

GraphDB’s Explain Plan is a feature that explains how GraphDB executes a SPARQL query and also includes information about unique subject, predicate and object collection sizes. It can help you improve the query, leading to better execution performance.

{info}The Explain Plan was introduced in GraphDB version 6.0/6.1 and has been used as the regular feature up until version 6.4.3 when an improved Experimental Explain Plan was introduced. Both features are available for GraphDB versions 6.4.3, 6.4.4 and 6.5.{info}

{note}When queries are more complex, the Experimental Explain Plan works better than the regular one.{note}