Using ICEIEXIT data

DFSORT enables you to provide an installation initialization exit (ICEIEXIT) routine which can be used to examine some performance-related information about all DFSORT applications at a site.

If present and activated, the ICEIEXIT routine is passed installation and run-time information. As this document illustrates in later sections, the values of installation and run-time parameters affect DFSORT performance.

The ICEIEXIT routine can examine installation and run-time information related to:

Virtual storage limits
Hiperspace limits
Memory object limits
Data space limits
Use of VERIFY
OUTFIL buffer space limits

as well as additional run-time information on:

Type of DFSORT application (sort, merge, or copy)
Method of invocation
Use of the Blockset technique
Use of storage above 16 MB virtual

See z/OS DFSORT Installation and Customization for complete information on how to write and install an ICEIEXIT routine.