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grafana/docs/sources/alerting/fundamentals/alert-rules/alert-instances.md
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/docs/grafana/latest/alerting/fundamentals/alert-rules/alert-instances/
Learn about Grafana alert instances
grafana
alerting
instances
Alert instances 103

Alert instances

Grafana managed alerts support multi-dimensional alerting. Each alert rule can create multiple alert instances. This is exceptionally powerful if you are observing multiple series in a single expression.

Consider the following PromQL expression:

sum by(cpu) (
  rate(node_cpu_seconds_total{mode!="idle"}[1m])
)

A rule using this expression will create as many alert instances as the amount of CPUs we are observing after the first evaluation, allowing a single rule to report the status of each CPU.

{{< figure src="/static/img/docs/alerting/unified/multi-dimensional-alert.png" caption="A multi-dimensional Grafana managed alert rule" >}}