Prometheus rule evaluation slow warning
Prometheus rule evaluation took more time than the scheduled interval. It indicates a slower storage backend access or too complex query.
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The query compares the time taken for the last evaluation of a rule group (prometheus_rule_group_last_duration_seconds) with the group’s scheduled interval (prometheus_rule_group_interval_seconds). The alert triggers when an evaluation takes longer than its interval, signalling a slow storage backend or an overly complex query.
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