A control area is a contiguous area of DASD that ranges in size from one track to one cylinder. This display tells the number of Control Intervals in each Control Area.
Total number of control interval splits that occurs when a data record insert occurs and there is not enough space in the control interval for the inserted record.
Total number of Control Area splits that occur when a Control Interval split occurs and there is not space for another Control Interval in the Control Area.
Control Interval free space is the percentage of empty space to be left in each Control Interval when the file is initially loaded.
The free space lets records be inserted or expanded within a Control Interval before requiring a Control Interval split.
Control Area free space is the percentage of Control Intervals to be left unused in each Control Area as the file is initially loaded. The use of Control Area free space lets some Control Interval splits occur before requiring a Control Area split.
Amount of space allocated to the VSAM file that does not contain a Control Interval.
The number of bytes of space being managed by the VSAM file.
The highest byte number within a used Control Interval.
Freespace as a percentage of the high used RBA.
The minimum amount of data that is transferred together (which is at least one Control Interval).
Number of physical records in each DASD track.
Number of tracks in each Control Area.
This section contains counts of the number of data records and the number of times data records have been inserted, deleted, updated, and retrieved since the initial load of the VSAM file. The following counts are displayed:
The total number of records actually in the data or index component. This statistic is not maintained when the data set is processed in control interval mode.
The number of records that have been deleted from the data or index component.
For a key-sequenced data set, the number of records that have been inserted into the data component before the last record; records originally loaded and records added to the end are not included in this statistic. For relative record data sets, it is the number of records inserted into available slots; the number of records originally loaded are included in this statistic.
The number of records that have been retrieved for update and rewritten. This value does not reflect those records that were deleted, but a record that is updated and deleted is counted in the update statistics.
The number of records that have been retrieved from the data or index component, whether for update or not for update.
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