Dear all, I'm experiencing a performance issue that I can't understand... I'm using: - Jena 3.14.0 , Fuseki (I'm testing in the web interface) - TDB1 - none.opt - this configuration: https://github.com/buda-base/buda-base/blob/master/conf/fuseki/ttl.erb (with some variable substitutions) - the relevant data is all contained in this file: http://purl.bdrc.io/graph/MW23703.ttl
a minimal version of the query is the following, with the relevant comments: prefix : <http://purl.bdrc.io/ontology/core/> prefix bdr: <http://purl.bdrc.io/resource/> CONSTRUCT { bdr:MW23703_1183 ?instp ?insto . ?t ?tp ?to . ?ancestor :hasPart ?ancestorPart . # this next line is weird: comment it and you gain 200ms in the long query, but the variables are not bound anyways ?ancestor ?ancestorp ?ancestoro . } WHERE { # in this form (no line commented), the query takes 1.5 to 2s # comment any of the lines and the performance improvement is very dramatic bdr:MW23703_1183 ?instp ?insto . # 200ms alone bdr:MW23703_1183 :hasTitle ?t . ?t ?tp ?to . #245ms alone bdr:MW23703_1183 :partOf+ ?ancestor . ?ancestor :hasPart ?ancestorPart . # 200ms alone } so it seems that the issue is not just one bgp that needs optimization but some sort of interaction between the various components? Is there something I'm doing wrong? Thanks in advance, -- Elie
