What performance metric indicates how much time a service was not operational in Dynatrace?

Total downtime is the performance metric that indicates how much time a service was not operational in Dynatrace. This metric provides a quantifiable measure of unavailability, reflecting periods during which the service was down and unable to serve requests. It allows teams to assess the reliability and stability of the service over a defined period.

This information is crucial for understanding service performance, enabling teams to make informed decisions about potential improvements, resource allocations, and maintain service-level agreements. By focusing on total downtime, organizations can directly relate this metric to their customer experience and operational efficiency, highlighting the importance of uptime in their overall service delivery.

The other options provide different perspectives on service performance but do not specifically quantify unavailability. For instance, the number of outages indicates how many distinct incidents occurred but does not reflect the total duration of downtime. The slowest day provides insight into performance under load, while performance (in seconds) might track response times rather than availability.