The Performance Hub in Oracle Database Management is a comprehensive tool for monitoring database performance. Its main interface prominently features the Average Active Sessions (AAS) chart, which provides an overview of the database workload. Within the Performance Hub, the Real-Time SQL Monitoring feature allows for detailed analysis of long-running SQL statements. When examining a specific monitored SQL statement, the details page includes granular I/O statistics, one of which is Physical Reads. Therefore, both AAS (at the hub level) and Physical Reads (at the specific SQL level) are metrics available while using this feature.

C. Number of CPUs on the host: This is static host configuration information, not a real-time performance metric monitored for a SQL statement within Performance Hub.

D. Database Version: This is static database identification information and is not a performance metric displayed in the Real-Time SQL Monitoring feature.

1. Oracle Cloud Infrastructure Documentation, Database Management, "Monitor and Tune a Managed Database with Performance Hub": This document describes the main components of the Performance Hub. The section "About the Performance Hub UI" explicitly states, "The time series chart shows the Average Active Sessions (AAS) data..." This confirms that AAS is a primary metric available in the interface where SQL Monitoring is performed.

2. Oracle Cloud Infrastructure Documentation, Database Management, "Monitor SQL Statements in Real-time": This document details the Real-Time SQL Monitoring feature. In the section describing the "Monitored SQL Details" page, under the "Details" tab, it lists the available metrics. The "I/O" subsection includes metrics such as "I/O Requests," "I/O Bytes," and explicitly mentions "Physical Reads" as a monitored statistic for the SQL execution. This directly confirms Physical Reads is an available metric.