Mixed Data Source - Native Plugin

This is a built in data source that allows you to mix different data source on the same graph! You can enable this by selecting the built in -- Mixed -- data source. When selected this will allow you to specify data source on a per query basis. This will, for example, allow you to plot metrics from different Graphite servers on the same Graph or plot data from Elasticsearch alongside data from Prometheus. Mixing different data sources on the same graph works for any data source, even custom ones.