I have 4 series of data in Grafana chart, but graph lines aren't continuous. Anyone knows why? Here is a sample graph with query:
It means that some data exists on a specific timeline whereas some data doesn't. So, for instance, in your case, your data that is represented as a yellow colour has something at 23:07, however, the one that is a blue colour has nothing in a database for this time. As a result, you have gaps in your timeline.
If you want to connect missing points, just change the Connect null values
parameter from Never
to Always
: