gtpm1m19TPF V4R1 Migration Guide: 3.1 to 4.1

Setting Central Processing Unit (CPU) Loop Shutdown Levels

In the TPF 3.1 system, shutdown processing was based on 381-, 1055-, and 4 KB blocks. In the TPF 4.1 system, CPU loop shutdown levels are set only for:

The values are specified as a percentage of the total number allocated after any system-induced storage reductions have occurred.

Shutdown values are initially set to system initialization program (SIP) values that are hardcoded based on a typical TPF 4.1 system. You can adjust these values by entering the ZACLV command, based on the performance of your system and your data reduction output.