| Start time |
The time at which the measurement was initiated. |
| End time |
The time at which the measurement ended. |
| Start date |
The date upon which the measurement was initiated. |
| End date |
The date upon which the measurement ended. |
| Total samples |
The total number of samples taken during the
measurement. |
| Sampling rate |
The overall sampling rate expressed in samples
per second. |
| CPU/WAIT samples |
The number of samples in which CPU activity
was observed or all TCBs were in wait state. Excluded from this count
are samples in which no CPU activity was observed and one or more
TCBs were dispatchable. |
| TCB samples |
The number of samples in which TCBs existed.
This number might be slightly smaller than the total number of samples.
This occurs when some samples were taken at the beginning of a job
step before the step initialization had completed. |
| Overall CPU |
The average system CPU utilization percentage
during the measurement period. It is obtained from the field CCVUTILP,
which is the system CPU utilization as viewed by the System Resource
Manager (SRM). Thus, it is the CPU utilization for this z/OS® image. |
| Overall zAAP CPU |
The average CPU Utilization
percentage for the zAAP processor(s) during the measurement period.
It is obtained from field, CCVUTILI, which is the zAAP CPU Utilization
as viewed by the System Resource Manager (SRM). |
| Overall zIIP CPU |
The average CPU Utilization
percentage for the zIIP processor(s) during the measurement period.
It is obtained from field, CCVUTILS, which is the zIIP CPU Utilization
as viewed by the System Resource Manager(SRM). When the processor
has the zAAP on zIIP feature, zAAP time will also show in this field. |
| Duration |
The duration of the measurement in minutes
and seconds. |
| Report dataspace |
The size of the dataspace used to load the sample
file and create indexes for reporting. This field is reported in megabytes. |
| Sample dataspace |
The size of the dataspace used to record measurement
data while sampling. This is the total uncompressed size reported
in megabytes. |
| Meas significance |
The ratio of the number of CPU/WAIT samples
to the number of TCB samples. This is a measure of the quality of
the measurement data. A low value indicates that CPU resources were
unavailable to service the job step. |
| CPU queued samples |
The number of samples in which no activity was
occurring in the address space due to the unavailability of CPU resources. |
| Pages in |
The number of page-in operations that occurred
during the measurement interval. |
| Pages out |
The number of page-out operations that occurred
during the measurement interval. |
| EXCPs |
The number of EXCPs processed during the measurement
interval. |