This section contains the following statistics:
These statistics fields contain the global data collected by the log manager domain. For more information on logging and journaling, see Logging and journaling: performance considerations, and Interpreting journalname and log stream statistics.
These statistics can be accessed online using the EXEC CICS® COLLECT STATISTICS STREAMNAME command and are mapped by the DFHLGGDS DSECT. For programming information about the EXEC CICS COLLECT STATISTICS command, see the CICS System Programming Reference manual.
DFHSTUP name | Field name | Description |
---|---|---|
Activity Keypoint Frequency (AKPFREQ) | LGGAKPFREQ | is the current activity keypoint trigger value, which
is the number of logging operations between the taking of keypoints. This
is the AKPFREQ value specified in the SIT, or as an override, or changed dynamically
using CEMT SET SYSTEM AKP(value) or EXEC CICS SET SYSTEM AKP(fullword binary data-value)
commands.
Reset characteristic: not reset
|
Activity Keypoints Taken | LGGAKPSTKN | is the number of activity keypoints taken.
Reset characteristic: reset to zero
|
Log Deferred Force (LGDFINT) Interval (msec) | LGGLGDEFER | is the current log deferral interval, which is the period
of time used by CICS Log Manager when determining how long to delay a forced
journal write request before invoking the MVS™ system logger. This is the LGDFINT value
specified in the SIT, or as an override, or changed dynamically using CEMT
SET SYSTEM LOGDEFER(value) or EXEC CICS SET SYSTEM LOGDEFER(halfword binary data-value)
commands.
Reset characteristic: not reset
|
These statistics fields contain the resource data collected by the log manager domain. For more information on logging and journaling, see Logging and journaling: performance considerations, and Interpreting journalname and log stream statistics.
These statistics can be accessed online using the EXEC CICS COLLECT STATISTICS STREAMNAME command and are mapped by the DFHLGSDS DSECT. For programming information about the EXEC CICS COLLECT STATISTICS command, see the CICS System Programming Reference manual.
DFHSTUP name | Field name | Description |
---|---|---|
Log Stream Name | LGSTRNAM | is the logstream name.
Reset characteristic: not reset
|
System Log | LGSSYSLG | indicates if the logstream forms part of the System Log.
Reset characteristic: not reset
|
Structure Name | LGSSTRUC | is the coupling facility (CF) structure name for the logstream.
The structure name is only applicable to coupling facility type logstreams.
Reset characteristic: not reset
|
Max Block Length | LGSMAXBL | is the maximum block size allowed by the MVS Logger for the
logstream.
Reset characteristic: not reset
|
DASD Only | LGSDONLY | indicates the type of logstream. If set to 'YES'
the logstream is of type DASDONLY. If set to 'NO' the logstream is
of type coupling facility (CF).
Reset characteristic: not reset
|
Retention Period | LGSRETPD | is the logstream retention period (in days) that the data
must be kept before it can be physically deleted by the MVS Logger.
Reset characteristic: not reset
|
Auto Delete | LGSAUTOD | is the log data auto delete indicator. If set to 'YES'
the MVS Logger automatically deletes the data as it matures beyond the retention
period, irrespective of any logstream delete calls. If set to 'NO'
the data is only deleted when a logstream delete call is issued and the data
has matured beyond the retention period.
Reset characteristic: not reset
|
Delete Requests | LGSDELETES | is the number of DELETEs of blocks of data from the logstream.
For non-system logs, the report will show 'N/A' here, as CICS does not issue
Log Delete requests against non-system logs.
Reset characteristic: reset to zero
|
Query Requests | LGSQUERIES | is the number of queries that CICS made to check the status of the logstream.
Reset characteristic: reset to zero
|
These statistics fields contain the request data collected by the log manager domain.
These statistics can be accessed online using the EXEC CICS COLLECT STATISTICS STREAMNAME command and are mapped by the DFHLGSDS DSECT. For programming information about the EXEC CICS COLLECT STATISTICS command, see the CICS System Programming Reference manual.
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 whilst 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 whilst 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 whilst 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
|
Summary statistics are not available online.
These statistics fields contain the logstream summary global data.
DFHSTUP name | Description |
---|---|
Activity Keypoint Frequency (AKPFREQ) | is the last activity keypoint trigger value, which is
the number of logging operations between the taking of keypoints. This is
the last AKPFREQ value as specified in the SIT, or as an override, or changed
dynamically using CEMT SET SYSTEM AKP(value) or EXEC CICS SET SYSTEM
AKP(fullword binary data-value) commands.
|
Total Activity Keypoints Taken | is the total number of activity keypoints taken.
|
Log Deferred Force (LGDFINT) Interval (msec) | is the last log deferral interval, which is the period
of time used by CICS Log Manager when determining how long to delay a forced
journal write request before invoking the MVS system logger. This is the last LGDFINT
value that was specified in the SIT, or as an override, or changed dynamically
using CEMT SET SYSTEM LOGDEFER(value) or EXEC CICS SET SYSTEM LOGDEFER(halfword binary data-value)
commands.
|
Summary statistics are not available online.
These statistics fields contain the logstream summary resource data.
DFHSTUP name | Description |
---|---|
Log Stream Name | is the logstream name.
|
System Log | indicates if the logstream forms part of the System Log.
|
Structure Name | is the coupling facility (CF) structure name for the logstream.
The structure name is only applicable to coupling facility type logstreams.
|
Max Block Length | is the maximum block size allowed by the MVS Logger for the
logstream.
|
DASD Only | indicates the type of logstream. If set to 'YES'
the logstream is of type DASDONLY. If set to 'NO' the logstream is
of type coupling facility (CF).
|
Retention Period | is the logstream retention period (in days) that the data
must be kept before it can be physically deleted by the MVS Logger.
|
Auto Delete | is the log data auto delete indicator. If set to 'YES'
the MVS Logger automatically deletes the data as it matures beyond the retention
period, irrespective of any logstream delete calls. If set to 'NO'
the data is only deleted when a logstream delete call is issued and the data
has matured beyond the retention period.
|
Log Delete Requests | is the total number of DELETEs of blocks of data from
the logstream. For non-system logs, the report will show 'N/A' here, as CICS does not issue Log Delete requests against non-system logs.
|
Log Query Requests | is the total number of queries that CICS made to check
the status of the logstream.
|
Summary statistics are not available online.
These statistics fields contain the logstream summary request data.
DFHSTUP name | Description |
---|---|
Log Stream Name | is the logstream name.
|
Write Requests | is the total number of WRITEs of blocks of data to the
logstream.
|
Bytes Written | is the total number of bytes written to the logstream.
|
Buffer Appends | is the total number of occasions on which a journal
record was successfully appended to the current logstream buffer.
|
Waits Buffer Full | is the total number of attempts made to append a journal
record to the current logstream while the buffers were logically full.
|
Peak Force Wtrs | is the peak number of tasks suspended whilst requesting
a FLUSH of the logstream buffer currently in use.
|
Total Force Waits | is the total number of tasks suspended whilst requesting
a FLUSH of the logstream buffer currently in use.
|
Log Browse Starts | is the total 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.
|
Log Browse Reads | is the total 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.
|
Retry Errors | is the total number of occasions on which MVS system logger retryable
errors occurred when a block of data was being written to the logstream.
|