A Robust Method of Frame Allocation
Original Publication Date: 2003-May-22
Included in the Prior Art Database: 2003-May-22
The current frame allocation algorithm in z/OS* provides frames to all requestors when available frames exist, in all situations, regardless of the significance of the request. This method has allowed the pool of available frames to become depleted and subsequently cause system outages when no frames exist for non-suspendable requestors. In OS/390*, expanded storage provided a cache for auxiliary storage where real storage could be paged out to expanded quickly to replenish the system's supply of frames. Such a cache does not exist for z/OS*; thus a new frame management algorithm is required which will better maintain the system's supply of frames.