System for modification of dynamic buffer allocation by comparing modification request with current allocation and updating allocation based upon comparison discrepancy

摘要

A dynamic buffer change system according to the present invention copies the initial values of the setting for the buffer areas constituting a class for each of the classes as divisions of a buffer region when the system is started up. Upon request to change the setting for the buffer areas in a class, the current setting for the buffer areas of the class is read from the class data region and compared with the requested setting. If, in the comparison by a change control means, any discrepancy is found, the setting for the buffer areas of the class is changed according to the setting requested. At the same time, the setting for the buffer areas in the class data region is also rewritten according to the requested setting.