Which two statements are true about the Oracle Cloud Infrastructure (OCI) Monitoring tools available for Base Database Service Virtual Machine DB Systems?

The Oracle Cloud Agent, which is installed on Base Database Service Virtual Machine DB Systems, is essential for monitoring. It collects a range of metrics covering the operating system (e.g., CPU, memory utilization), the underlying VM infrastructure, and specific database performance indicators (e.g., storage usage, connections). This data is sent to the Oracle Cloud Infrastructure (OCI) Monitoring service, where it can be visualized on the Console's metric charts and dashboards. Furthermore, the OCI Monitoring service is designed to work with the OCI Notifications service. Users can configure alarms based on specific metric thresholds. When a metric crosses a defined threshold, an alarm is triggered, which then uses the Notifications service to send alerts via configured channels like email, PagerDuty, or Slack.

A. OS metrics, such as CPU and memory utilization, are fully integrated with the OCI Monitoring service and can be used to create charts, dashboards, and alarms, not just collected.
B. Base Database Service provides users with OS-level access (via SSH), allowing them to install and manage their own software, including third-party monitoring agents. There is no such prohibition.
E. OCI provides native tools like Performance Hub directly within the OCI Console for monitoring database performance, refuting the claim that Enterprise Manager is the only tool for this purpose.

1. Oracle Cloud Infrastructure Documentation, "Monitoring a DB System": "The Oracle Cloud Infrastructure Monitoring service enables you to actively and passively monitor your cloud resources using metrics and alarms. The Database service is fully integrated with the Monitoring service... The Oracle Cloud Agent is required for DB system and database metrics." This document also lists available metrics, including OS-level (CpuUtilization, MemoryUtilization) and database-level (StorageUtilization), confirming that the agent collects them for use in OCI Monitoring. This supports option C and refutes A.

2. Oracle Cloud Infrastructure Documentation, "Overview of Monitoring": "You can use the Monitoring service to... Create alarms that notify you when metrics meet alarm-specified triggers. Notifications are delivered through the Notifications service." This section describes the core functionality of creating alarms and integrating with the Notifications service, which applies to all metrics, including those from DB Systems. This supports option D.

3. Oracle Cloud Infrastructure Documentation, "Using Performance Hub to Monitor Databases": "Performance Hub allows you to view and analyze the performance of Oracle Databases. The Performance Hub page is available in the Oracle Cloud Infrastructure Console for Base Database Service..." This directly contradicts option E by showing a powerful, integrated OCI tool for performance monitoring.

4. Oracle Cloud Infrastructure Documentation, "Connecting to a DB System": This document details how to connect to a DB system using SSH, which grants OS-level administrative access. This access inherently allows for the installation of custom software, including third-party agents, making option B incorrect.