Increasing the amount of virtual storage available to DFSORT can significantly improve the performance of many sort applications, especially large sorts. The optimal amount of virtual storage varies with the amount of data being sorted. Consequently, the best performance and most efficient use of virtual storage can only be obtained by tuning the virtual storage of each individual sort. DSA does most of this tuning automatically, relieving system and application programmers of the task. By using the optimal amount of virtual storage, DFSORT maximizes its performance while minimizing the impact of DFSORT applications on the system.