The Remainder of the Buffer

The data in the remainder of the buffer depends on whether you have specified the COSTATSFMT keyword. COSTATSFMT is valid only for structures allocated in a coupling facility with CFLEVEL=5 or higher.

For structures allocated in a coupling facility with CFLEVEL=4 or lower, or when COSTATSFMT=COCOUNTSLIST is specified or defaulted to, the remainder of the buffer is as follows:

The remainder of the buffer consists of four-byte entries. There is a one-to-one correspondence between each four-byte entry and a cast-out class in the range of cast-out classes for which the information is returned. Each entry contains the number of cache structure data elements allocated to the corresponding cast-out class. The first buffer entry corresponds to the cast-out class specified on the COCLASSB keyword. The next entry corresponds to the next sequentially numbered cast-out class, and so forth.

The following chart summarizes the buffer format and contents upon return from the request:

Offset	Contents
+0	Number of the first cast-out class reported on
+2	Number of the last cast-out class reported on
+4	Number of data elements allocated for the cast-out class specified by COCLASSB
+8	Number of data elements allocated for the next sequential cast-out class.
+(4 * n)	Number of data elements allocated for the last cast-out class where n is the total number of elements returned in the buffer.

Mapping CCIHCOUNTS of IXLYCCIH maps the information returned for structures allocated in a coupling facility with CFLEVEL=4 or lower or by specifying COSTATSFMT=COCOUNTSLIST.

For structures allocated in a coupling facility with CFLEVEL=5 or higher and for which COSTATSFMT=COSTATSLIST is specified, the remainder of the buffer is as follows:

The remainder of the buffer, starting at offset 32, consists of 16-byte entries. There is a one-to-one correspondence between each 16-byte entry and a cast-out class in the range of cast-out classes for which the information is returned. Each entry contains the number of cache structure data elements allocated to the corresponding cast-out class and eight bytes of user data. If the structure has been allocated with a UDF order queue for each cast-out class, the eight bytes is the user data of the first entry on the UDF order queue. If the structure has not been allocated with a UDF order queue, the eight bytes is the user data of the first entry on the cast-out class queue. The first buffer entry corresponds to the cast-out class specified on the COCLASSB keyword. The next entry corresponds to the next sequentially numbered cast-out class, and so forth.

The following chart summarizes the buffer format and contents upon return from the request:

Offset	Contents
+0	Number of the first cast-out class reported on
+2	Number of the last cast-out class reported on
+4	Reserved
+32	Cast-out class entry data for the cast-out class specified by COCLASSB. Number of data elements allocated User data
+64	Cast-out class entry data for the next sequential cast-out class.
+(32 * n)	Number of data elements allocated for the last cast-out class where n is the total number of elements returned in the buffer.

Mapping CCIHCCIBS of IXLYCCIH maps the information returned for structures allocated in a coupling facility with CFLEVEL=5 or higher when COSTATSFMT=COSTATSLIST is specified. For a description if IXLYCCIH, see z/OS® MVS™ Data Areas in the z/OS Internet library.