Dear all, My setup includes about 5000 rules with the following pattern: rule "1" when ( $c_0 : CFRO( fi.co == "1", su.co == "P", c.co == "C") or $c_0 : CFRO( fi.co == "2", su.co == "P", c.co == "C") or $c_0 : CFRO( fi.co == "3", su.co == "P", c.co == "C") or $c_0 : CFRO( fi.co == "4, su.co == "P", c.co == "C") or $c_0 : CFRO( fi.co == "5", su.co == "P", c.co == "C") ) then Bcf fact = new Bcf (); fact.setC( "123"); insert( fact); end The number of disjunctions varies, it might go up to 80. Just loading these 5000 rules uses about 200mb. I use 5.1.1. Is this to be expected or do I something fundamentally wrong. Any help highly appreciated. For instance, would it make sense to use a rule for each of the disjunction? I add the rules the with the following code: DroolsObjectInputStream stream = new DroolsObjectInputStream(inputStream); Collection<KnowledgePackage> knowledgePackages = (Collection<KnowledgePackage>)stream.readObject(); stream.close(); engine.addKnowledgePackages(knowledgePackages); Many thanks in advance Thomas _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users