Analyzing Monitor Data › Interactive Analysis Option 5 - DataView › Display Data Set Information

Display Data Set Information

You can display relevant information about data sets using the following procedure.

Follow these steps:

1. Use the Select line command to display the Data Set Details panel. If the data set is a VSAM data set, you might see an enhanced Data Set Details panel.

   Data set statistics might not be available for very short measurements, or for data sets that are allocated and unallocated for brief intervals (less than two seconds).

   The DataView panel opens.

2. Complete the following fields:

   Profile

   Name of the profile that you specified when you created the monitor definition.

   Options

   Type of analysis in effect: NORMAL, ALL, ACTIVE, or WAIT.

   An asterisk (*) following the value indicates that tasks or transactions have been selected for analysis. Place the cursor on the Options field value and press Enter to display a pop-up panel listing the selected tasks/transactions.

   Linklist

   Current Linklist setting of ON or OFF.

   DD name

   DDNAME that was used to allocate the data set.

   For a concatenation, multiple lines are displayed with identical DDNAMEs for each associated data set. For I/O that CA MAT cannot identify, the pseudo-DDNAME .IOnnnn appears in this field, where nnnn is the unit address.

   Dataset name

   Full name of the data set.

   For a concatenation, multiple lines are displayed with identical DDNAMEs for every data set that is associated with the DDNAME.

   Delay%

   Percentage of the monitored period that activity was detected against the DD statement shown.

   If several data sets are allocated to a single DD statement, this number is repeated for every data set.

   Visual

   Graphical representation of Delay%.

3. Scroll right to display the following fields:

   Block Size

   Block size of the data set.

   Record Length

   Logical record length of the records that were created by the application.

   RECFM

   Format of the records that were written to the data set. The following list explains each value:

   • F - fixed records
   • FB - fixed blocked records
   • V - variable records
   • VB - variable blocked records
   • U - undefined records

   EXCPs

   Number of EXCPs that were issued during the monitor period for this data set.

   An EXCP is equivalent to reading or writing a single block to or from the data set.

   Connect Time

   Number of milliseconds during the monitored period that represents the end-to-end time for transferring data to or from the external media and memory.

   Note: This time might exceed the monitored period because of data overlap. This overlap occurs when multiple blocks of data are moved to or from memory concurrently.

   R/W

   This represents 'open intent', if the DDNAME is for a data set, this field displays the intention of the program in opening the data set.

   If the DDNAME is for a database, this field displays the type of database. For data sets, this field contains one of the following values: DIRECT, GET MOVE, GET LOCATE, PUT MOVE, PUT LOCATE, READ, WRITE, MEMBER READ, MEMBER WRITE, PROGRAM LOADING, UNDETERMINED. For databases, this field contains one of the following values: ADA, DB2, DCM, IMS, MQ, and IDMS.

   DSORG

   Organization of the data set. The following list explains the possible values:

   • DA - direct access
   • PS - physical sequential
   • IS - indexed sequential
   • VSAM - virtual sequential access method
   • PO - partitioned organization

   Access Method

   Access method that was used to read from or write to the data set. Possible values are as follows

   • BPAM - basic partitioned access method
   • BTAM - basic telecommunications access method
   • EXCP - execute channel program
   • GRPH - graphics access method
   • DA - direct access method
   • ISAM - indexed sequential access method
   • SAM - sequential access method
   • SUBS - JES subsystem access
   • TAP - TCAM application access
   • TCAM - telecommunications access method
   • VSAM - Virtual Sequential Access Method
   • VTAM - Virtual Telecommunications Access Method

   Buffer Size

   Buffer size for the data set.

   This size is generally the same as the Block Size.

   Buffer Number

   Number of buffers that are allocated for the data set.

   Number Extents

   Number of physical extents that are allocated to the data set.

   For non-VSAM data sets, this number might be in the range of 1 to 16. VSAM allows up to 128 extents for a data set.

   Alloc Unit

   Allocation unit for the data set. This field contains one of the following values:

   • BLK - Space is allocated in blocks.
   • CYL - Space is allocated in cylinders.
   • TRK - Space is allocated in tracks.
   • DSN - The DDNAME indicates a database rather than a data set.
   • (blank) - CA MAT did not detect the unit of allocation.

   PRI Size

   Primary Unit - the initial allocation of cylinders, tracks, or blocks for a data set on direct access

   Depending on the allocation unit, this field contains the following value:

   • For CYL, the number of cylinders allocated.
   • For TRK, the number of tracks allocated.
   • For BLK, the number of blocks allocated.

   SEC Size

   Secondary Unit - The secondary allocation of cylinders, tracks, or blocks for a data set on direct access

   Depending on the allocation unit, this field contains the following value:

   • For CYL, the number of cylinders allocated.
   • For TRK, the number of tracks allocated.
   • For BLK, the number of blocks allocated.

   Seq Nr.

   CA MAT sequence number of the record

   This sequence number is incremented by CA MAT for each scheduling of the sampler into the target address space.

   UCB Addr

   Unit Control Block number for this data set.

   The UCB is the logical device number, expressed in hexadecimal, on which this data set resides.

   VOLSER(s)

   First six volume serial numbers on which this data set resides.

   The volume serial numbers are not separated by commas.