What triggers a synthetic monitor global outage alert in Dynatrace?

A synthetic monitor global outage alert in Dynatrace is triggered when there is no response from all configured geographic regions. This means that the monitoring tool detects that all synthetic checks across different geographical locations are failing to receive a response, indicating a potential widespread issue affecting the application's availability or performance.

This type of alert is critical for identifying significant outages since it ensures that the problem is not localized to a single region. The ability to monitor multiple geographic regions is essential for applications serving a global user base, and a denial of service across all regions typically signifies a serious operational issue, prompting immediate investigation and remediation efforts.

The other situations described would not trigger a global outage alert because they do not indicate a failure across all monitoring regions. A single regional site failure may suggest a localized issue, immediate responses from all regions indicate normal operation, and scheduled maintenance periods are expected and planned events.