Update your CFRM policy with coupling facility structure size changes

Description: If you are migrating to a new level of coupling facility control code (CFCC), you have to make appropriate coupling facility structure size updates in the z/OS® coupling facility resource management (CFRM) policy.

Steps to take: If you are migrating to a new CFCC level, do the following:

1. Run the Coupling Facility Structure Sizer (CFSizer) tool. This tool sizes structures, taking into account the amount of space needed for the current CFCC levels. The tool sizes for the most currently available level; you might find that the results are oversized if you use an earlier CFCC level. You can find the tool at Coupling Facility sizer.

   Alternatively, you can run an as-is batch utility program called SIZER after you have brought a new CFLEVEL coupling facility into use in your configuration. SIZER examines your currently allocated coupling facility structures and recalculates the size that should be used for them with the new later-CFLEVEL coupling facility. The as-is SIZER utility is available as a zipped package that you can download from http://www.ibm.com/systems/support/z/cfsizer/altsize.html .

2. Update the CFRM policy with the size modifications that are needed.
3. Activate the updated CFRM policy so that it becomes the active policy governing structure allocation in the sysplex.

Reference information: For a detailed description of coupling facility code levels and the processors that support those levels, see http://www.ibm.com/systems/z/advantages/pso/cftable.html .