fillmissing Metrics Operator

If a metric query returns results with empty timeslices, the visualization contains a straight line between the data points on either side of the empty timeslice(s).

You can use the fillmissing operator to fill empty time slices in metric query results with a derived data point. You can choose between several methods of deriving a data point, or leave empty timeslices empty.

Syntax

fillmissing [using] <policy>

Where <policy> is one of:

• empty. No data point is derived, and the visualization is discontinuous.
• interpolation. The derived data point is a linear interpolation of the data points prior to and after the empty time slice(s).
• last. The derived data point is the same value as the previous data point.
• <fixed>. With this option, you supply a fixed value, for example “50”, and the derived data point will have that value.

Query without fillmissing

The chart in this section shows metric query results without the fillmissing operator.

_sourceCategory=Labs/VMWare6.5/Metrics hostname=thisveryhost metric=cpu_ready

Example 1: fillmissing empty

The chart in this section shows metric query results with the fillmissing operator with the empty option. Note that empty time slices are not filled with a derived data point. 

_sourcecategory=labs/aws/host/metrics metric=CPU_Idle 
| avg by _sourcename 
| fillmissing empty

Example 2: fillmissing interpolation

The chart in this section shows metric query results with the fillmissing operator with the interpolation option. Note that empty time slices are filled with a derived data point whose value is a linear interpolation of the data points prior to and after the empty time slice. 

_sourceCategory=labs/aws/host/metrics metric=CPU_Idle 
| avg by _sourcename 
| fillmissing interpolation 

Example 3: fillmissing last

The chart in this section shows metric query results with the fillmissing operator with the last option. Note that empty time slices are filled with a derived data point whose value is the value of the metric from the previous time slice.

_sourceCategory=Labs/VMWare6.5/Metrics hostname=thisveryhost metric=cpu_ready | fillmissing last

Example 4: fillmissing with fixed value

The chart in this section shows metric query results with the fillmissing operator with a constant value of 0. Note that empty time slices are filled with a data point whose value is 0.

_sourceCategory=labs/aws/host/metrics metric=CPU_Idle 
| avg by _sourcename 
| fillmissing 0