Logstream: Request statistics
You can retrieve log stream request statistics by using the EXEC CICS EXTRACT STATISTICS STREAMNAME system command. They are mapped by the DFHLGSDS DSECT.
These statistics fields contain the request data collected by the log manager
domain.
| DFHSTUP name | Field name | Description |
|---|---|---|
| Log Stream Name | LGSTRNAM | is the logstream name. Reset characteristic: not reset
|
| Write Requests | LGSWRITES | is the number of WRITEs of blocks of data to the
logstream. Reset characteristic: reset to zero
|
| Bytes Written | LGSBYTES | is the total number of bytes written to the logstream
Reset characteristic: reset to zero
|
| Buffer Appends | LGSBUFAPP | is the number of occasions on which a journal
record was successfully appended to the current logstream buffer.
Reset characteristic: reset to zero
|
| Waits Buff Full | LGSBUFWAIT | is the total number of attempts made to append
a journal record to the current logstream buffer while the buffers
were logically full. This situation arises when the current logstream
buffer has insufficient space to accommodate the journal record, and
I/O is already in progress for the alternate logstream buffer. Reset characteristic: reset to zero
|
| Current Frce Wtrs | LGSCUFWTRS | is the current number of tasks suspended while
requesting a flush of the logstream buffer currently in use. Reset characteristic: not reset
|
| Peak Frce Wtrs | LGSPKFWTRS | is the peak number of tasks suspended while requesting
a flush of the logstream buffer currently in use. Reset characteristic: reset to current
|
| Total Force Wts | LGSTFCWAIT | is the total number of tasks suspending while
requesting a flush of the logstream buffer currently in use. Reset characteristic: reset to zero
|
| Browse Starts | LGSBRWSTRT | is the number of BROWSE operations started on
the logstream. For non-system log logstreams, the report will show
'N/A' here, as you cannot browse these. Reset characteristic: reset to zero
|
| Browse Reads | LGSBRWREAD | is the number of READs of blocks of data from
the logstream. For non-system log logstreams, the report will show
'N/A' here, as you cannot browse these. Reset characteristic: reset to zero
|
| Retry Errors | LGSRTYERRS | is the number of occasions on which MVS™ system
logger retryable errors occurred when a block of data was being written
to the logstream. Reset characteristic: reset to zero
|