azure - terraform中触发阈值和metric_trigger阈值之间的区别

Question

我正在添加指标警报以监视 AKS 中托管的 Web api，并且正在查看azurerm_monitor_scheduled_query_rules_alert 此处。我无法分辨这两个阈值之间的区别。我对目的以及每个应用的用途感到困惑？

trigger {
    operator  = "GreaterThan"
    threshold = 3
    metric_trigger {
      operator            = "GreaterThan"
      threshold           = 1
      metric_trigger_type = "Total"
      metric_column       = "operation_Name"
    }
  }