Azure Monitor - Determining what aggregation interval to use

I’m currently working on Promitor which is scraping the Azure Monitor API for metrics based on a configuration file.

As part of an Azure Monitor query an interval needs to be defined in order to specify the metrics granularity such as:

 var metricQuery = metricDefinition.DefineQuery()
                .StartingFrom(recordDateTime.AddDays(-5))
                .EndsBefore(recordDateTime)
                .WithAggregation(metricAggregation.ToString())
                .WithInterval(TimeSpan.FromMinutes(5));

However, depending on the metric this is different and the value needs to be exact. Otherwise you will have exceptions like these:

Invalid time grain duration: PT3M, supported ones are: 00:01:00,00:05:00,00:15:00,00:30:00,01:00:00,06:00:00,12:00:00,1.00:00:00

This brings me with a few questions:

• What is the best approach to ensure that these are correct? Is that to check the “Metric Availabilities” for a specific metric and verify that it’s present?
• Are they really different for every metric or is there an enum that can help us with this?

[anirudhcavale]

@hovsepm, @tomkerkhove : The metric granularity enums are PT1M PT5M PT15M PT30M PT1H PT6H PT1D. Most metrics support all of these granulartires. However there are some exceptions, a few metrics only support PT5M, or only support PT1H and higher. As you guessed @tomkerkhove the only way to know is to call “Metric Availabilities”.

[hovsepm]

@anirudhcavale could you help here?