The CFRM policy contains the maximum structure size and can contain a smaller initial size also. The initial structure size defined in the CFRM policy (or the maximum size if an initial size is not specified) is used as the attempted allocation size unless it is overridden by a structure size specified on the IXLCONN macro.

The CFRM policy can also optionally designate a minimum structure size. The MINSIZE value specifies the minimum bound for the structure size on all allocation requests except those resulting from system-managed rebuild.

The CFRM policy can optionally specify the maximum amount of storage-class memory that is available to a structure. The use of storage-class memory affects the structure's resource usage in a complex manner. See Requesting the use of storage-class memory for a discussion of its implications.