I enjoy using Heatmaps to visualize (non) change. In a heatmap of a thousand cells, the human eye can immediately spot any outliers.
I would like to visualize the delta of log data such as total bytes written. I would assume Derivative aggregation is the way to go here.
This works just fine with Line charts: for the Y-axis, I can select Aggregation to Parent Pipeline Aggregation --> Derivative and then choose the total bytes written document field.
For Heatmap charts, there are no Parent Pipeline Aggregations available in the dropdown for the Metrics Value -- only the Metric Aggregations such as Average, Count etc are available.
Is this proper behavior?
Stack: ES 7.8.0, Kibana 7.8.1.
Please advise. Thank you.