List report

The following command produces a System Logger List report like that shown in Figure 1.
CICSPA NOAPPLID,           
       LOGGER(OUTPUT(LOGR0001),
              EXTERNAL(CPAXW001), 
              LIST,               
              SORT(LOGSTREAM))    
Figure 1. System Logger List report
                                                       CICS Performance Analyzer
                                                     System Logger report - List
 
LOGR0001 Printed at 12:03:45 04/17/2013     Data from 14:00:00:01  5/27/2010 to 14:30:00:12  5/27/2010                 Page       1
                                                                                                                                   
                                                                                                                                   
Logstream name                     Structure name          MVSID       Group       Flag        Interval expired at      Level
IYOT1.DFHLOG                       LOG_JG                  MV55        PROD        Staging     09:00:00.00  6/20/2004   SP7.0.4
                                                                                                                                   
           ----------- IXGWRITES ----------                ---------------- DELETIONS -----------------                            
                                                  Bytes       Count       Count       Bytes       Bytes                            
                                               Writn to        With     Without       After    Int Stor                            
                          Total     Average     Interim        DASD        DASD     Offload    w/o DASD                            
              Count       Bytes       Bytes     Storage       Write       Write     w. DASD       Write                            
           --------    --------    --------    --------    --------    --------    --------    --------                            
              11248     4348827         386     6768128           0        9327           0     3348643                            
                                                                                                                                   
           ---------------------------------------------------- EVENTS --------------------------------------------------------    
                                     Demand                                          Demand     Minimum     Maximum     Staging    
                        Staging        DASD     Staging       Entry      Struct     Init'd        Block       Block    DS Async    
           Offloads    Threshld      Shifts        Full        Full        Full    Offloads      Length      Length    Buf Full    
           --------    --------    --------    --------    --------    --------    --------    --------    --------    --------    
                  3           0           0           0           0           0           0         116        1422           0    
                                                                                                                                    
           ----------------------- EVENTS -------------------------    --------------- DASD Writes ----------------                 
                                                 Struct      Struct                                                                 
                                               Rebuilds    Rebuilds                   Total                                         
              Type1       Type2       Type3     Init'd     Complt'd       Count       Bytes     Average       Waits                 
           --------    --------    --------    --------    --------    --------    --------    --------    --------                 
              11216          32           0           0           0           0           0           0           0                 
                                                                                                                                    
____________________________________________________________________________________________________________________________________
                                                                                                                                    
Logstream name                     Structure name          Flag           MVSID     Level                                           
*ALTER RECORD*                     LOG_JG                  Staging        MV55      SP7.0.2                                         
                                                                                                                                    
------------ STRUCTURE ALTER -----------------                                                
SMF record time stamp   19:15:00:23 10/07/2009                                               
                                                                                             
            Current                 Current    Targeted      Struct         Log         Log  
              Bytes                 Average     Average        Size        Data     Streams  
            Written    Offloads       Bufsz       Bufsz    (Blocks)      Writes    Connectd  
           --------    --------    --------    --------    --------    --------    --------  
                  0           2         768         768        5056           0           0  

The following fields are shown on the System Logger List report:

Logstream Name
The name of the logstream.
Structure Name
The name of the structure.
MVSID
MVS™ System ID.
Group
GROUP value for this logstream. Either PROD (production) or TEST.
Flag
Staging. If the SMF88LFT flag is set, this logstream used the staging data set during this interval.

Disconnect. If SMF88LDS is on, this SMF record was generated as a result of a logstream disconnect.

Interval expired at
The time of day when the current SMF interval expired.
Note: When you run the Logger report on a system with a different time zone setting to that of the SMF data, you must specify the ZONE operand to convert the System Logger time stamps from GMT to local time. By default, CICS PA will use the reporting system's time zone settings and the Logger report time stamps will not reflect the local time of the data. Specify ZONE to match the time zone of the SMF data and the Logger report time stamps will reflect the local time of the data.
Level
MVS Release level.

Information on IXGWRITES:

Count
The number of IXGWRITE requests.
Total Bytes
Bytes written by IXGWRITE requests.
Average Bytes
The average number of bytes written by IXGWRITE requests.
Bytes Writn to Interim Storage
The number of bytes written to interim storage.

Information on DELETIONS:

Count With DASD Write
The number of deletes from interim storage written to DASD.
Count Without DASD Write
Number of deletes from interim storage without having been written to the log data set.
Bytes After Offload w. DASD
Bytes deleted after data was offloaded to DASD log data sets. If SMF88SIB is high and the SMF88SAB is low, CICS® is successfully using interim storage to avoid the I/O incurred by offloading to DASD log data sets.
Bytes Int Stor w/o DASD Write
Count of bytes deleted instead of being written to DASD. Due to CICS tail trimming, that is, deletion of records which are no longer required for recovery. It shows how successfully CICS avoids offloads for data that it intends to delete from interim storage.

Information on EVENTS:

Offloads
Number of times the log stream was offloaded.
Staging Threshld
Number of times system logger detected a Staging Data Set Threshold Hit condition (HIGHOFFLOAD reached) for the staging data set.
Demand DASD Shifts
Number of log stream DASD shifts (additional log data set allocates) initiated by this system. For DFHLOG and DFHSHUNT this value should be small, otherwise too much data is being offloaded. (the LS_SIZE parameter for the IXCMIAPU logstream definition utility should be checked).
Staging Full
Number of times staging data set was full. The cause of any non-zero condition should be investigated.
Entry Full
Number of times all log streams connected to the structure are offloaded by IXLOGR due to 90% of the structure's list entries being full.
Struct Full
Number of times a structure full condition was reached. The cause of any non-zero condition should be investigated.
Demand Init'd Offloads
Number of demand initiated offloads.
Staging DS Async Buf Full
Number of times the system logger detected a Staging Data Set Async Buffer Full condition for this log stream on this system for this SMF interval.
Minimum Block Length
Minimum block length. If set to 7FFFFFFF then there was no activity for this interval.
Maximum Block Length
Maximum block length.
Type1
Type 1 CF event. Normal write. Indicates that, after the write completed, the percentage of resource in use by the structure was less than the high offload threshold, meaning that system logger is using the coupling facility successfully. This number should be high.
Type2
Type 2 CF event. Indicates that, after the write completed, the percentage of the logstream in use was greater than or equal to the high off load threshold. This can happen at the point where the offload value is reached or the offload is already in progress.
Type3
Type 3 CF event. Indicates that a given log stream is close to consuming 90% of the coupling facility resource allocated to it. A type-3 completion can occur if there is a failure which prevents system logger from promptly moving data from the coupling facility structure to DASD log data sets or if the system logger configuration is tuned incorrectly. For example, system logger's access to its DASD log data sets would be slowed if those data sets reside on the same device as some other heavily-used data sets. A type-3 can also occur if many log streams are defined to share the same structure, because each newly defined log stream causes system logger to dynamically repartition storage among the existing logstreams. If a log stream has a large proportion of type-3 completions, system logger is getting dangerously close to the STRUCTURE FULL condition.
Struct Rebuilds Init'd
Number of structure rebuild events initiated for this log stream, as seen by this system. Excessive structure rebuilds should be investigated. Structures are rebuilt in the event of logstream connectivity failure in accordance with the REBUILDPERCENT parameter of the IXCMIAPU utility.
Struct Rebuilds Compl'd
Number of structure rebuild events completed for this log stream, as seen by this system. Excessive structure rebuilds should be investigated. Structures are rebuilt in the event of logstream connectivity failure in accordance with the REBUILDPERCENT parameter of the IXCMIAPU utility.

Information on DASD Writes:

Count
No. of DASD write requests.
Total Bytes
Total bytes written to DASD (offload data sets).
Average
Average number of bytes written to DASD (offload data sets).
Waits
No. of times System Logger had to suspend processing before writing to DASD because a previous DASD write request had not completed.

Information on STRUCTURE ALTER:

SMF record time stamp
The time of day when this SMF record was written.
Current Bytes Written
Current WRITTEN-Bytes-Structure. Count of bytes written to the structure on this system.
Offloads
The number of offloads that occurred for this structure.
Current Average Bufsz
Current allocated average buffer size for the structure.
Targeted Average Bufsz
Targeted average buffer size. Average buffer size System Logger attempted to achieve, by altering the element to entry ratio.
Struct Size (Blocks)
Structure Size. Represented in the number of 4K blocks.
Log Data Writes
Total number of log data writes at the time of the recording interval.
Log Streams Connectd
Total number of log streams connected to the structure on this system at the time of the recording interval.

Information Information

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Timestamp icon Last updated: Saturday, 8 February 2014


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