Hi there, I am investigating a issue similar to this one: http://tech.groups.yahoo.com/group/jena-dev/message/45210
My in-memory (tried TDB as well) InfModel is working just fine the first "run" (each run ~60 queries). The Queries could surely be optimized, but actually the execution time would be sufficient: Each time round about 20-70ms. However, I created a testing suite that triggers 8 parallel "runs" (each with 60 or more query executions) in order to simulate the expected future usage of my web application. Each run, the execution times raise about 30-50% (an because of concurrency, the blockingtime of each thread gets mean). When I look at com.hp.hpl.jena.reasoner.rulesys.impl.LPBRuleEngine.activeInterpreters after several of these runs, the activeInterpreters count is extremly high (hundrets of thousands or even millions): This is probably the cause for the raise in execution times. At first I suspected my crappy Query as cause of defect, but I stripped nearly everything (custom properties etc.) and the issue stays the same, only now in a smaller scale. Each run adds "only" 100 activeInterpreters there. So, I have not a clue how to stop this behaviour. I expect a steady performance of my knowledge base. I would appreciate any hints! Relevant code snippets: * Model creation: http://pastebin.com/xdZQhhqT * Query (stripped from nearly everything): http://pastebin.com/CXuHTEwg * Query execution: http://pastebin.com/3YnEQVUv I tried both the latest Developmentsnapshot and the latest stable version or Jena and ARQ Bye, -- Martin
