RACF® supports REBUILDPERCENT for coupling facility cache structures. This support causes a rebuild to be driven for a RACF structure when the specified overall percentage of system-weight loses connectivity to the structure. Your installation should have an alternate coupling facility available for this purpose; if your installation only has one coupling facility, you should not use REBUILDPERCENT.

System weights are specified in the sysplex failure management policy. Note that different systems can have different system weights. REBUILDPERCENT is specified with the structure in the coupling facility resource management policy. We recommend that you use the same REBUILDPERCENT value for all RACF structures. What that percentage should be depends on the weights given to the systems and on your installation's particular needs for connectivity. See z/OS MVS Setting Up a Sysplex for more information.