Measure Reference Manual

Common and ZMS Style Only Counter Field DDL Definitions for DEVICE Entities
These counter fields are used in both styles of DDL records. Fields that are used in ZMS Style DDL
records only are noted.
Fields are listed alphabetically.
DBIO-READS
Number of read operations to the measured device that were enabled for direct bulk I/O to a
requesting application processor. This counter is a subset of READS.
Counter type: Incrementing.
DBIO-WRITES
Number of write operations to the measured device that were enabled for direct bulk I/O from a
requesting application processor. This counter is a subset of WRITES.
Counter type: Incrementing.
DEVICE-QBUSY-TIME
Time spent in a state in which requests of any number or type were queued to this device in this
processor.
Because of concurrent activity in the write and read queues, WRITE-QBUSY-TIME plus
READ-QBUSY-TIME does not equal DEVICE-QBUSY-TIME.
Counter type: Queue Busy.
INPUT-BYTES
Number of bytes read from the device. Because the I/O process modifies this counter before the
I/O operation, if the write fails, this counter might not be accurate. In addition to programmatic
read operations, internal operations (such as retries on I/O operations) also modify this counter.
In D-series and G-series RVUs, this is a 32-bit counter. In H-series and J-series RVUs, this is a 64-bit
counter.
In G-series RVUs, the INPUT-BYTES-F field is a 64-bit version of INPUT-BYTES.
Counter type: Accumulating.
OUTPUT-BYTES
Number of bytes written to the device. Because the I/O process modifies this counter before the
I/O operation, if the write fails, this counter might not be accurate. In addition to programmatic
write operations, internal operations (such as writing volume labels) also modify this counter.
In D-series and G-series RVUs, this is a 32-bit counter. In H-series and J-series RVUs, this is a 64-bit
counter.
In G-series RVUs, the OUTPUT-BYTES-F field is a 64-bit version of OUTPUT-BYTES.
Counter type: Accumulating.
READ-QBUSY-TIME
Time spent in a state in which read requests of any number were queued to this device in this
processor.
Counter type: Queue Busy.
READ-QTIME
Total time spent by read requests queued to this device.
Counter type: Queue.
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