3 Replies Latest reply on Apr 19, 2016 6:55 PM by alwu-Oracle

    Jena adapter performance (2.11.1)

    arnaudz

      Hi

      Previously when I use  jena 2.7.2 adapter on a database with nearly 100 million triples and I run a query similar to the following

       

      SELECT  * 

      WHERE {

      ?x a <http://myhost.com#aClass> .

      ?x <http://myhost.com#Link.anotherClass>  ?y .

      ?y a <http://myhost.com#anotherClass> .

      } LIMIT 100

       

      It took less than 15s but if I used the new Jena adapter on the same database now it require nearly  2 minutes …

      The query is not very complex, and the only change is the jena. How can we explain the differences in execution time?

      Thanks