Dell EMC Metro node 7.1 Administrator Guide

• counters - Monotonically increasing value (analogous to a car’s odometer)
  • Counters are used to count bytes, operations, and errors.
  • Often reported as a rate such as counts/second or KB/second.
• readings - Instantaneous value (analogous to a car’s speedometer)
  • Readings are used to display CPU utilization, memory utilization.
  • Value can change every sample.
• period-average - Average of a series calculated over the last sample period. If:
  • current_reading_sum is the sum of all readings for the particular statistic since the monitor's creation.
  • previous_reading_sum is the count of all readings for the statistic since the monitor's creation.
  • period-average = (current_reading_sum - previous_reading_sum) / (current_reading_count - previous_reading_count)

Many statistics require a target port or volume to be specified. Output of the monitor stat-list command identifies which statistics need a target defined, and the type of target required when a monitor is created.