gtpd1m10Database Reference

Specifying VFA Buffer Ratios and Percentages

After a system IPL, you can enter the ZVFAC DEFINE command to modify VFA values for use in allocating main storage and building the VFA allocation chains. See TPF Operations for more information about the ZVFAC command.

If new VFA allocation values are used, perform a hardware IPL with the clear option after the TPF system is successfully cycled down from NORM state or successfully cycled to 1052 state.

If VFA has to rebuild VFA on an IPL, it will use the values stored in keypoint record A (CTKA) to allocate resources.