1. An updating and reference management system of a shared memory for managing updating requests and reference requests to the shared memory from processes or objects in processes, said system comprising: an area management unit which divides said shared memory into a plurality of areas and manages the updating requests and the reference requests to each divided area; and a timing unit which generates, for said area management unit, an updating timing signal based on a real time; wherein one of the processes having an updating request is allocated with a predetermined area by an operation for obtaining a portion of said shared memory, and sends the updating request for the allocated area to said area management unit, wherein said area management unit receives and processes the sent updating request, but delays its execution during a timing interval defined by the updating timing signal, then executes the updating request at the time when the updating timing signal is given from said timing unit, the reference requests from the processes are processed immediately throughout the timing interval, and wherein an identical time circumstance is provided at any of the objects in the processes sharing time, and an overhead memory access is reduced when the shared memory is referred to by the processes or objects.