Performance › CPU Performance Compared to Memory Utilization › STANDARD Mode

STANDARD Mode

In STANDARD mode, CA Vtape maximizes available memory at the expense of some additional CPU overhead. In this mode, CA Vtape actively manages the amount of storage it uses by frequently releasing the dataspace memory pages that have been written to the LDSs.

CA Vtape does this by periodically issuing a DIV RESET command for memory pages that have been previously saved to DASD. By releasing these memory pages, CA Vtape helps maximize available memory for other tasks running within the operating system.

Standard is the recommended and default setting. You can use the Display Status console command to determine the current setting.

Note: The SET CPU command setting is stored in the CA Vtape Local VCAT and remains in effect across IPLs until specifically changed. In a multisystem CA Vtape configuration, it is valid to allow different system images to have different SET CPU settings.