Real-time statistics collected from LUNs can be used to produce graphs that include performance data. Examples of performance data include read operations, write operations, latency, and queue depth.
The following real-time statistics are available for a LUN:
- Read IOPS
- Indicates the average number of read operations per second.
- Write IOPS
- Indicates the average number of write operations per second.
- Read bytes per second
- Indicates the rate at which the system has transferred bytes from a drive during read operations.
- Write bytes per second
- Indicates the rate at which the system has transferred bytes to a drive during write operations.
- Read latency
- Indicates the average time to complete a read operation.
- Write latency
- Indicates the average time to complete a write operation.
- Read block size
- Displays the average amount of data read that are red in a read operation.
- Write block size
- Displays the average amount of data that are written in a write operation.
- Total block size
- Displays the average amount of data that are transferred in a read or write operation.
- Read queue depth
- Displays the number of read operations that are waiting to be fulfilled, on average.
- Write queue depth
- Displays the number of write operations that are awaiting to be processed, on average.
- Total bytes per second
- Displays the total bytes transmitted per second, on average.
- Total IOPS
- Indicates the total number of read and write operations per second.
- Total latency
- Indicates the average time to complete operations.
- Total queue depth
- Displays the total number of I/O operations that are queued for processing, on average.