1Z0-1104-25 Question 168
Select 2You are a security engineer responsible for monitoring and alerting on performance metrics across multiple Linux compute instances in OCI. You want to track CPU utilization, memory usage, and disk IO to detect potential resource exhaustion or performance-related security issues. Which two steps must you take to properly configure the monitoring and alerts using OCI Monitoring?
- A
Enable the integrated OCI Health Checks feature on your compute instances to automatically create CPU and memory usage alarms without additional configuration.
- B
Configure the default set of metrics and create an alarm for CPU utilization by setting a threshold and interval, then use OCI Notifications to send alerts when this threshold is breached.
- C
Install the Oracle Cloud Agent on each instance and enable the Compute Instance Monitoring plugin to gather memory and disk IO metrics, then configure individual alarms for those custom metrics in OCI Monitoring.
- D
Use the OCI Resource Manager service to track disk latency automatically, as Resource Manager collects performance metrics for compute instances without requiring additional setup.
Show answer and explanation
Correct answers: B, C
Explanation
To effectively track performance metrics such as CPU, memory, and disk IO usage, you must leverage OCI Monitoring and the Oracle Cloud Agent's additional monitoring plugins. While the default OCI metrics cover CPU utilization, memory and disk IO require the agent-based custom metrics. Health Checks and Resource Manager do not fulfill this role. For more details, refer to the Oracle Cloud Infrastructure documentation on Monitoring (https://docs.oracle.com/en-us/iaas/Content/Monitoring/Concepts/monitoringoverview.htm) and the Oracle Cloud Agent (https://docs.oracle.com/en-us/iaas/Content/Compute/Tasks/cloudagent.htm).
- A. Incorrect.
Incorrect: OCI Health Checks primarily monitor endpoints (URLs or IP addresses) for accessibility and response, not internal performance metrics like CPU or memory usage. You still need OCI Monitoring and the Oracle Cloud Agent to gather those metrics in detail.
- B. Correct.
Correct: Creating an alarm for CPU utilization is straightforward with the default metrics provided by OCI Monitoring. Specifying a threshold (e.g., 80% CPU for 5 minutes) and integrating OCI Notifications for alert delivery is a standard best practice.
- C. Correct.
Correct: By installing and enabling the Oracle Cloud Agent with the Compute Instance Monitoring plugin, you can capture additional metrics that are not provided by default, including memory usage and disk IO. You then create alarms on these custom metrics in OCI Monitoring.
- D. Incorrect.
Incorrect: OCI Resource Manager is an infrastructure-as-code service for automating resource provisioning. It does not collect or manage performance metrics from compute instances. You must use OCI Monitoring (and the Oracle Cloud Agent for custom metrics) to gather detailed performance data.