Microsoft DevOps Engineer Expert AZ-400 Practice Question
An Azure virtual machine named vm-finance01 runs a heavy nightly ETL job. Azure Monitor and VM Insights are configured, and you are troubleshooting reports of poor performance. You want to confirm whether the OS disk saturated its provisioned IOPS or throughput limits during the last job run by using Metrics Explorer in the Azure portal. Which metric should you chart to make this determination?
The metric OS Disk IOPS Consumed Percentage shows, as a percentage, how many of the provisioned IOPS for the operating-system disk are being used. When the value approaches or reaches 100 %, the disk has hit its performance limit, confirming saturation.
Disk Read Bytes/sec and Logical Disk Avg. Disk Queue Length provide raw throughput or queue depth but do not indicate proximity to the disk's service limits. Percentage CPU relates only to processor usage and does not reflect storage contention.
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Microsoft DevOps Engineer Expert AZ-400
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