description Azure Monitor Alerts (Metric-Based) Overview
This is the most straightforward alerting mechanism, triggering when a specific metric (e.g., CPU utilization > 90% for 5 minutes) crosses a defined threshold. While simple and effective for basic capacity alerting, it lacks the context of log analysis or complex query logic, making it insufficient for modern, nuanced incident detection.
help Azure Monitor Alerts (Metric-Based) FAQ
How do Azure Monitor metric alerts work?
A metric alert watches a numerical signal and triggers when it crosses a configured threshold. A common example is CPU utilization above 90 percent for five minutes.
What is the difference between an Azure Monitor metric alert and a log alert?
Metric alerts evaluate time-series measurements such as CPU or request count. Log alerts query collected log data, so they can use richer event context but may require more setup.
Can Azure Monitor metric alerts detect a server outage?
They can detect metric conditions that suggest a problem, but a single metric may not explain the cause. Pairing availability checks, metrics, and logs gives a more complete view of an outage.
What makes metric alerts useful for capacity monitoring?
They are straightforward for conditions such as sustained high CPU, memory pressure, or storage use. A threshold and evaluation window make the alert easy to understand and automate.
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