摘要: We present a queueing network model of virtual memory computer system including the effect sharing among processes. Page fault and file request overheads are explicitly taken into account. The fact that some pages have to be saved in secondary at moment page fault, is also consideration. obtain an approximate solution using equivalence decomposition approach. program behavior parameters (primary size, drum disk characteristics, locality, input-output rates different ratios) as well total number processes, examined for two organizations. In first one, all processes share real core; second, having issued lose their space until I/O performed.