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Zorluk: KolayCloudWatch Metrics and Alarms

A SysOps Administrator is configuring an Amazon CloudWatch alarm to monitor the CPU utilization of a standalone Amazon EC2 instance. The administrator wants the alarm to evaluate metrics at 1-minute intervals. However, the alarm remains in the INSUFFICIENT_DATA state because the CPU metric is only being reported every 5 minutes. Which actions must the administrator take to resolve this issue? (Select TWO.)

  1. Enable detailed monitoring on the EC2 instance.Cevap
  2. Configure the CloudWatch alarm with a period of 60 seconds.Cevap
  3. C
    Enable high-resolution metrics on the EC2 instance.
  4. D
    Create an Amazon EventBridge rule to poll the EC2 instance CPU metrics every 60 seconds.
  5. E
    Modify the EC2 Auto Scaling group cooldown period to 60 seconds.

Cevap

Enable detailed monitoring on the EC2 instance and configure the CloudWatch alarm with a period of 60 seconds.
To resolve the insufficient data issue and alarm at a 1-minute frequency, standard EC2 monitoring (5-minute interval) must be upgraded to detailed monitoring, which publishes metrics every 1 minute. Additionally, the CloudWatch alarm itself must be configured with a 60-second evaluation period to match the metric publishing rate.

Adım Adım Çözüm

1
Enable detailed monitoring on the target EC2 instance.
The instance begins publishing CPU utilization metrics at 1-minute intervals rather than the default 5-minute standard monitoring intervals.
CloudWatch cannot alarm at 1-minute periods if data is only available every 5 minutes, resulting in an INSUFFICIENT_DATA state.
2
Set the alarm period to 60 seconds.
The alarm evaluates the 1-minute data points published by detailed monitoring.
This matches the metric ingestion frequency and allows the alarm to trigger within the desired 1-minute window.

Anahtar Kavram

By default, EC2 instances report metrics at a 5-minute frequency (standard monitoring). To evaluate metrics at a 1-minute resolution, detailed monitoring must be enabled on the instance, and the CloudWatch alarm's evaluation period must be configured to 60 seconds.
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CloudWatch Metrics and Alarms

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