[rules-users] drools problem

Hi , I am not sure about drools perfomance does it depends on no of rules or at no of objects . When i am having 30000+ objects in the memory , i am facing the perfomance issues . Can any one tell how i can increase the perfomance of my rule Engine in case where i 'll have to have large number of objects in memory . Please inform if you have any idea about this. Thanks & Regards Saurabh