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cf-min

Input Stack:
aggr: AggregationFunction
 ⇨ Output Stack:
AggregationFunction

Force the consolidation function to be minimum when aggregating data points within time intervals. This operator overrides the default consolidation behavior to ensure that when multiple data points fall within a single time step, the minimum value is selected rather than using other methods like averaging or summing.

Warning

Performance Impact: This operator can make queries significantly more expensive by preventing consolidation pushdown and is rarely needed or desirable.

Parameters

  • aggr: The aggregation function to apply minimum consolidation to

How Consolidation Works

When the step size for a graph is larger than the reporting interval of the data, multiple data points may fall within a single graph interval. The consolidation function determines how these points are combined:

  • Default behavior: Most aggregation functions use their natural consolidation (e.g., :sum uses avg consolidation)
  • Override behavior: :cf-min forces minimum consolidation regardless of the aggregation function

Examples

Force minimum consolidation for a sum aggregation:

name,requests,:eq,:sum,:cf-min

This ensures that when multiple sum values exist within a time interval, the minimum of those sums is displayed rather than averaging them.

  • :cf-max - Force maximum consolidation
  • :cf-avg - Force average consolidation
  • :cf-sum - Force sum consolidation

See Also