Dump space for the coupling facility.
You can define only one dump space in each coupling facility; however, that dump space can contain several structure dump tables. IBM recommends that you specify 5% of the available storage in a coupling facility for dump space. If you do not specify any coupling facility dump space, none will be allocated and no structures in the coupling facility can be dumped.
An alternative method to the 5% "rule of thumb" for defining the amount of dump space is to allow all coupling facility storage that is not dedicated to structures to be used as dump space. Using this method maximizes the use of coupling facility storage while ensuring that there is enough coupling facility storage space available for all structures defined in a given CFRM policy. This method allows you to define more that 5% of coupling facility storage for structure dumping if there is excess storage available in the coupling facility.
Calculate the amount of storage available for dump space as follows:
Valid values: 1 - 6 decimal digits (in kilobytes)