When introducing or operating Oracle Enterprise Manager Cloud Control 13.5 (EM13.5), understanding how each component interacts is indispensable for troubleshooting and sizing. In this article, we will explain the entire picture from Management Agents to the Repository DB based on official documentation (primary information).
We will also touch upon the release of the latest Enterprise Manager 24ai, clarifying the overall landscape of the ever-evolving EMCC.
Conclusion: Key Points of EM13.5 Architecture
- OMA (Management Agent): Resides on each target host; responsible for metric collection and deployment.
- OMS (Management Service): A J2EE application running on WebLogic; controls communication with agents.
- OMR (Management Repository): A database (Oracle 19c or higher recommended) that stores collected data and configuration information.
- Console: The UI layer for accessing the OMS via a browser.
Major Features: What You Can Do with EMCC
EMCC is not merely a monitoring tool but an integrated platform for managing the entire lifecycle of Oracle systems.
- Integrated Monitoring and Diagnostics:
- Real-time performance monitoring of databases, hosts, and middleware.
- Identification of bottlenecks using ADDM (Automatic Database Diagnostic Monitor).
- Lifecycle Management:
- Automation of patching (Patch Plan) and upgrades.
- Provisioning using Gold Images.
- Compliance and Security:
- Configuration checks and auto-remediation based on industry standards (e.g., CIS).
- Data masking and subsetting for sensitive data.
- Hybrid Cloud Management:
- Centralized management of on-premises and Oracle Cloud Infrastructure (OCI).
Illustration: Overall Architecture and Communication Paths
The structure of EMCC and its communication paths are shown in the text diagram below:
[ Administrator Browser ]
|
(HTTPS: 7803) <--- Console Access
|
+------V--------------------------+
| Oracle Management Service |
| (OMS / WebLogic Server) |
+------|------------------^-------+
| |
(SQLNet: 1521) (HTTPS: 4903) <--- Upload from Agent
| |
+------V---------+ +----|------------------------------+
| Management | | Managed Host (Target) |
| Repository | | +-----------------------------+ |
| (Oracle DB) | | | Oracle Management Agent | |
+----------------+ | | (OMA) | |
| +-------------|---------------+ |
| (Metric Collection) |
| +-------------V---------------+ |
| | Target (DB, WLS, Host etc.) | |
| +-----------------------------+ |
+-----------------------------------+
Communication Protocols and Port Numbers
| Source | Destination | Protocol | Default Port | Usage |
|---|---|---|---|---|
| Browser | OMS | HTTPS | 7803 | Management console operations |
| OMA (Agent) | OMS | HTTPS | 4903 | Uploading collected data |
| OMS | OMA (Agent) | HTTPS | 3872 | Checking agent status |
| OMS | OMR (DB) | SQL*Net | 1521 | Storing and reading metadata |
Latest Information: About Enterprise Manager 24ai
Enterprise Manager 24ai has been released as the latest version.
- Operational Efficiency via AI: Enhanced anomaly detection using AI and automation of fleet management.
- Oracle Database 23ai Support: Full support for the latest AI database features.
- Security Enhancements: Application of the latest TLS protocols and password management policies.
- Deeper OCI Integration: Seamless integration with Autonomous Database.
FAQ
Q1: If the agent stops, does the target also stop? A: No, it does not affect the operation of the target. However, monitoring and notifications will cease.
Q2: How many agents can one OMS manage? A: It depends on sizing, but a standard configuration typically handles hundreds to thousands of targets.
Q3: Is migration from EM13.5 to 24ai possible? A: Yes, migration is possible following the prescribed upgrade path. Note the version requirements for the Repository DB (19c or later recommended).
Summary
- The 3-tier structure of OMA, OMS, and OMR is the foundation.
- Strengths include not just monitoring but also lifecycle management and security.
- The latest 24ai version advances AI integration and support for the latest databases.
[reference]
Oracle Enterprise Manager Cloud Control 13.5 – Get Started
[!NOTE] This article explains targeting Oracle Enterprise Manager Cloud Control 13.5 and 24ai (screens and default values may differ for other versions).
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