> > Dear members of jena community > I am working with two ontologies, merged in a model, the size of the ontologies is as follows:
*ontology1* 2,7 Mbytes, 25K axioms and 6000 individuals *ontology2* 8,1 Mbytes, 72 K axioms, and 9000 items, I implemented a rule that checks if an item of o1 has the same label of an item of o2, with a generic rule reasoner of jena when I use less items in ontology 2, 3000 and 6000 i get the result in 7,2 and 21, sec, but with 9000 items, I get the following error: Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at org.apache.jena.reasoner.rulesys.impl.BindingVectorMultiSet.getSubSet(BindingVectorMultiSet.java:144) at org.apache.jena.reasoner.rulesys.impl.RETEQueue.fire(RETEQueue.java:114) at org.apache.jena.reasoner.rulesys.impl.RETEQueue.fire(RETEQueue.java:128) at org.apache.jena.reasoner.rulesys.impl.RETEQueue.fire(RETEQueue.java:128) at org.apache.jena.reasoner.rulesys.impl.RETEClauseFilter.fire(RETEClauseFilter.java:227) at org.apache.jena.reasoner.rulesys.impl.RETEEngine.inject(RETEEngine.java:492) at org.apache.jena.reasoner.rulesys.impl.RETEEngine.runAll(RETEEngine.java:474) at org.apache.jena.reasoner.rulesys.impl.RETEEngine.fastInit(RETEEngine.java:163) at org.apache.jena.reasoner.rulesys.FBRuleInfGraph.prepare(FBRuleInfGraph.java:471) at org.apache.jena.reasoner.rulesys.BasicForwardRuleInfGraph.getDeductionsGraph(BasicForwardRuleInfGraph.java:392) at org.apache.jena.rdf.model.impl.InfModelImpl.getDeductionsModel(InfModelImpl.java:169) My question is if there is a way to solve this memory issue in jena side?, given that the available memory of my computer is 1,2 gb, and I think that should not be the cause, however I could be wrong. Any support is thanked Luis Ramos
