Signals

You can view triggered signals and its history generated by the Forecaster app from the Alerting app.

Signals

Warning / Critical (triggered) Copied

The Forecaster app can trigger either of these signals:

Note

The static and forecast signals are independent of each other. The same entity can have both forecast and static signals triggered at the same time.

Cleared Copied

A forecast signal is cleared if it was previously triggered and the projected forecast within the specified duration is below the threshold. A static signal is cleared if it was previous triggered and the current status is now below the specified threshold. If a config is removed, signals triggered from entities that match the removed config will also be cleared.

Illustrative example Copied

Refer to the following thresholds as an example:

The example illustrates the lifecycle of signals triggered on an entity by the Forecaster app.

Signal_example

Instrumentation Copied

The Forecaster app leverages an in-house StatsD client to record metrics regarding its internal state. The following is a complete list of metrics collected by the app:

Metric Type Description
Total Processed gauge The total number of metrics processed in the last minute.
Total Excluded gauge The total number of metrics excluded for forecasting in the last minute.
Total Forecasts gauge The total number of metrics forecasted in the last minute.
Forecast Signals Generated gauge The total number of forecast signals generated in the last minute.
Static Signals Generated gauge The total number of static signals generated in the last minute.
Preprocessing Time duration The duration of preprocessing.
Forecast Time duration The duration of forecasts.
["Obcerv"] ["Obcerv > Forecaster"] ["User Guide"]

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