When does Dynatrace raise an alert for the Elastic Load Balancer's backend failure rate?

The condition under which Dynatrace raises an alert for the Elastic Load Balancer’s backend failure rate is specifically tied to monitoring the number of failed connection attempts. The threshold of more than 10 failed connection attempts per minute is significant because it indicates a potential issue with the backend services that the Elastic Load Balancer is attempting to communicate with.

In evaluating this option, it's important to consider that a failure rate exceeding this threshold suggests a pattern or trend that could lead to service interruption or user impact. By setting the alert at more than 10 failures per minute, Dynatrace ensures that users can be proactive in addressing backend issues before they escalate into larger problems. This aligns with best practices in monitoring and alerting, where thresholds are carefully chosen to balance sensitivity and the risk of unnecessary alerts.

In contrast, the other choices do not accurately represent the defined thresholds for backend failure alerts in this context. For instance, fewer than 10 failed attempts may not indicate a significant problem, while the options based on connection thresholds or success rates may not provide relevant information concerning backend failure rates specifically.