Grafana help page

Grafana

Grafana dashboards are being used to display all kinds of data gathered from your device and analytical pipelines and stored in the VictoriaMetrics v1.38 database. In this system Grafana v7.2.0 is integrated. PromQL is a query language that is used for working with the saved data and processing it into comprehensible and useful statistics. For some metrics there are also their anomalies displayed. These are calculated in two different ways.

First one is just a basic difference between the metric and its average over the last three weeks.

Second way used in these dashboards requires a bit more advanced PromQL skills. It is called "Detecting anomalies using seasonality". Seasonality is a characteristic of a time series metric in which the metric experiences regular and predictable changes that recur every cycle. In this case one cycle is one week. For better robustness against errors, the past three weeks are taken into consideration. This approach is used in dashboards for detected objects and system anomalies.

In almost every dashboard, variables are used for better accessibility to different data. Besides basic variables, dependent variables are used, which means that based on the value that is set in the first variable the second (dependent) variable shows different options that can be set.