Displaying detail statistics for a data set processed by snapshot utilities
The Data Set Detail subpanel displays detailed read and write information for a specified data set.
To access this information, press F6 on the Data Set Details subpanel when reviewing the statistics for an individual data set that was processed by a snapshot utility.
Data Set Detail subpanel
Reads Writes
Cache . . . . . : 0 0
CacheRate . . . : 0 0
CacheXfer . . . : .000000 .000000
Disk . . . . . . : 0 0
DiskRate . . . . : 0 0
DiskXfer . . . . : .000000 .000000
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The following table describes the information available of the Data Set Detail subpanel.
Detail statistics for data set processed by snapshot utilities
Field | Description |
|---|---|
Cache - Reads | The total number of reads from the extended buffer by the utility job using the snapshot component for the data set for this copy This value indicates the number of cache blocks that were read to provide preimage information. |
CacheRate - Reads | Cache read access rate (measured in blocks per second) by the latest utility job using the snapshot component for this copy |
CacheXfer - Reads | The time (measured in seconds per block) for reading data from the extended buffer for this data set by the utility job using the snapshot component Besides the actual extended buffer read time, the transfer time includes XBM processing time to bypass the DASD I/O request. |
Disk - Reads | The total number of reads from DASD for this data set by the latest utility job using the snapshot component |
DiskRate - Reads | Disk read access rate (measured in blocks per second) by the utility job using the snapshot component |
DiskXfer - Reads | The time (measured in seconds per block) for reading data from DASD for this data set by the utility job using the snapshot component This value includes the time required to update the page with the preimage from cache. |
Cache - Writes | The total number of blocks written to the extended buffer by the latest utility job for the data set This value indicates number of preimage data pages that were stored in the extended buffer for the snapshot component. |
CacheRate - Writes | Cache write access rate (measured in blocks per second) of the latest utility job for the data set |
CacheXfer - Writes | The time (measured in seconds per block) for writing data to the extended buffer for the data set |
Disk - Writes | The total number of writes to DASD by DB2 or VSAM for this data set since the copy started |
DiskRate - Writes | Disk write access rate (measured in blocks per second) by DB2 or VSAM for this copy |
DiskXfer - Writes | The time (measured in seconds per block) for writing data to DASD by the latest utility job for this data set This includes the time required to read preimages before allowing the write to complete. |