Super Metrics not behaving as expected for some metrics when Near Real-Time Metrics are enabled

Products

• VMware Aria Suite

Issue/Introduction

Symptoms:
When Near Real-Time Metrics are enabled, Super Metrics that are based on source metrics that are not rolled up based on their average might differ from what would be expected. Note that the formula graph preview while creating the Super Metric might look as expected.

Cause

When Near Real-Time Metrics are enabled, Aria Operations calculates and stores values every 20 seconds.

Every 5 minutes the last 15 values are rolled up depending on the metric's roll-up method. E.g. for the metric "power|energy_summation_sum", the method is SUM. So every 5 minutes the most recent 15 values are summed and stored.

Super Metric calculations happen approximately every 1 minute, the values of the source metrics over that sample length are used in that calculation, not the rolled-up values.

Every 5 minutes, the last 5 values of a Super Metrics are rolled up and stored, the roll-up type for a Super Metrics is always AVG, there is no way to specify another method.

Resolution

This is expected behavior for Super Metrics when Near Real-Time Metrics are enabled.

Additional Information

https://kb.vmware.com/s/article/67792