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Transfert per second on device loop1
Number of transfers per second that were issued to the device, multiple logical requests can be combined into a single I/O request to the device (a transfer is of indeterminate size).
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Data read/write on device loop1
Number of bytes read/write from/to the device..
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CPU utilization on device loop1
Percentage of CPU time during which I/O requests were issued to the device (bandwidth utilization for the device). Device saturation occurs when this value is close to 100%.
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Average service/wait time for I/O requests on device loop1
The average service time (in milliseconds) for I/O requests that were issued to the device.