(
   sum(rate(vm_new_timeseries_created_total[5m])) by(instance)
   /
   sum(rate(vm_rows_inserted_total[5m])) by (instance)
 ) > 0.1

900 seconds

severity=warning

dashboard:

http://localhost:3000/d/wNf0q_kZk?viewPanel=66&var-instance={{ $labels.instance }}

description:

VM constantly creates new time series on "{{ $labels.instance }}". This effect is known as Churn Rate. High Churn Rate tightly connected with database performance and may result in unexpected OOM's or slow queries.

summary:

Churn rate is more than 10% on "{{ $labels.instance }}" for the last 15m

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