Microsoft Azure Solutions Architect Expert AZ-305 Practice Question
A company runs critical workloads on 200 Linux and Windows virtual machines that span three Azure subscriptions. Operations must be alerted automatically if any VM's CPU utilization remains above 80 percent for longer than one minute. Administrators also need to review CPU performance trends for up to 90 days while keeping monitoring costs to a minimum. Which Azure Monitor-based solution should you recommend?
Install the Application Insights agent on each VM and rely on smart detection rules to identify sustained CPU spikes.
Use the automatically collected Percentage CPU platform metric stored in the Azure Monitor metrics store, and configure a static metric alert on each VM that triggers when the average value exceeds 80 percent for one minute.
Enable Azure Monitor for VMs (VM Insights) with Change Analysis and create log-based alert rules on the InsightsMetrics table.
Create a single Log Analytics workspace, install the Azure Monitor agent on all VMs, collect the Processor% Processor Time counter every minute, and configure log alert rules.
Azure platform metrics automatically include the Percentage CPU metric for every virtual machine at one-minute granularity. These metrics are stored in the Azure Monitor metrics store for 93 days at no additional storage cost, satisfying the 90-day trend-analysis requirement. You can create standard (static-threshold) metric alert rules configured to fire when the average Percentage CPU for each VM exceeds 80 percent over a one-minute evaluation period, providing near-real-time notification without any data-ingestion charges. Alternatives that rely on Log Analytics performance counters, VM Insights, or Application Insights would introduce extra ingestion and retention costs or are intended for application telemetry rather than host-level CPU monitoring. Therefore, using built-in platform metrics with static metric alerts is the most cost-effective and requirements-compliant solution.
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Microsoft Azure Solutions Architect Expert AZ-305
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