Overlapping silence rules delaying grouped notifications in Grafana Alertmanager

Grafana Alerting routes notifications through a Prometheus-compatible Alertmanager that groups alerts by shared labels before delivery. The Group Wait interval buffers alerts of the same group before the first notification, while Group Interval and Repeat Interval control subsequent sends. When multiple silence rules overlap a group, the intended behavior is not always clear: a silence matching only some labels in a group may suppress the entire notification batch, or the buffering delay may push a critical alert past its expected delivery window.

This creates an unresolved decision for teams that need both broad silences for maintenance windows and immediate delivery for unrelated critical failures sharing a common group label. The interaction between silence evaluation and group buffering is not fully documented, making it difficult to predict whether a critical alert will be delayed or dropped entirely.

Does an overlapping silence rule suppress an entire notification group or only the matching alerts within it? What effect do Group Wait and Group Interval have on delivery timing for unsilenced alerts in a partially silenced group? Can a configuration pattern prevent broad silences from delaying unrelated critical notifications?