The DD level EXCP count includes:
- I/O for system services, for example:
- Joblib/steplib processing
- Jobcat/stepcat processing
- Overlay supervisor processing
- Checkpoint data set processing.
- Number of channel programs for VSAM data sets
- Number of channel programs for VSAM data sets (excludes VSAM extended
format data sets)
- Number of 4K blocks for DIV objects (includes reads, writes, and
re-reads)
- Starting a channel program from an EXCP macro (includes VIO, excludes
BSAM, QSAM, BPAM on DASD)
- Starting a channel program from TCBEXCP macro (includes VIO, excludes
BSAM, QSAM, BPAM on DASD)
- Starting a channel program from an EXCPVR macro (includes VIO,
excludes BSAM, QSAM, BPAM on DASD)
- Starting a channel program in a system or user provided channel-end
appendage
- Starting a channel program in an abnormal-end appendage
- EXCPs for VIO data sets
- EXCPs issued to the SYSUDUMP, SYSABEND, and SYSMDUMP data sets
when these data sets reside on a direct access or tape device.
The DD level EXCP count does not include:
- EXCPs issued by the job entry subsystem
- TPUTs and TGETs handled by macro instructions (For TPUTs and TGETs,
EXCPs are accumulated on a system basis and are contained in SMF record
types 30, 32 (if detail is specified), 34 and 35 only.)
- I/O to or from spool
Only the type 6 and 26 SMF records contain counts for a job or
step I/O activity to spool data sets managed by either job entry subsystem.
Type 30 and 64 records are data set oriented and may contain the
EXCP count for one or more concurrent users.