Transient data: Summary global statistics
Transient data summary global statistics are not available online.
| DFHSTUP name | Description |
|---|---|
| Control interval size | is the last value encountered for the size of
the control interval, expressed in bytes.
|
| Peak control intervals used | is the peak number of control intervals concurrently
in the system.
|
| Times NOSPACE occurred | is a total number of times that a NOSPACE condition
has occurred.
|
| Writes to intrapartition data set | is the total number of WRITEs to the transient data data set. This includes both
WRITEs needed for recovery and WRITEs forced by the buffer being needed to accommodate another CI.
I/O activity caused by the latter reason can be minimized by increasing the buffer allocation.
|
| Reads from intrapartition data set | is the total number of times a CI has to be read
from disk. Increasing the buffer allocation decreases this activity.
|
| Formatting writes | is the total number of times a new CI was written
at the end of the data set in order to increase the amount of available
space.
|
| I/O errors | is the total number of input/output errors that
have occurred during this run of CICS®.
|
In the statistics produced
for buffer usage:
| DFHSTUP name | Description |
|---|---|
| Intrapartition buffers | is the last value encountered for the number of
transient data buffers specified by the TD system initialization parameter.
The number of buffers allocated may exceed the number requested.
|
| Peak intra. buffers containing valid data | is the peak number of intrapartition buffers which
contain valid data.
|
| Intrapartition accesses | is the total number of times that intrapartition
buffers have been accessed.
|
| Peak concurrent intrapartition accesses | is the peak number of concurrent intrapartition
buffer accesses.
|
| Intrapartition buffer waits | is the total number of times a request was queued
because all buffers were allocated to other tasks. A buffer wait
also occurs if the required control interval is already in a locked
buffer, and therefore unavailable, even if there are other buffers
available.
|
| Peak intrapartition buffer waits | is the peak number of requests queued because
no buffers were available.
|
All of the intrapartition data set statistics referenced in the table are printed, even if the values reported are zero.
CICS produces
the following statistics for multiple strings:
| DFHSTUP name | Description |
|---|---|
| Times string accessed | is the total number of times a string was accessed.
|
| Peak concurrent string accesses | is the peak number of strings concurrently accessed
in the system.
|
| Intrapartition string waits | is the total number of times that tasks had to
wait because no strings were available.
|
| Peak string waits | is the peak number of concurrent string waits
in the system.
|