Hi, I am a researcher and I am trying to study the underlying query performance of virtuoso queries.
In particular, given a SPARQL query I would like to understand how many triples it reads,
how many pages are read from disk and how many cache misses, and so on.
For example, we seen some queries that when run the first time they are slow and the second time they are faster, but some other queries this is not true, we cannot understand why.
This will help me understand why some query plans are less efficient than others for example.
Is it possible to obtain these statistics?