The format of the information returned from the READ_COSTATS request depends on the level of the coupling facility in which the structure is allocated and on the COSTATSFMT specification. For cache structures allocated in a coupling facility with CFLEVEL=5 or higher, you can use the COSTATSFMT keyword to specify the level of detailed information that is to be returned.

For cache structures allocated in a coupling facility with CFLEVEL=4 or lower, the system returns the cast-out class statistics to your buffers as follows: