How to use oracle database listening service manually

The reasons why the Oracle listening service is set to manual startup by default include: security considerations to prevent unauthorized access; optimization of performance to avoid unreasonable startup and resource consumption; providing management flexibility and allowing administrators to start on demand and stop services; facilitate security audits, track start and stop times; save resources and avoid consuming system resources when monitoring is not needed.

Why is the Oracle listening service set to manual by default?

Oracle listening service is set to start manually by default, mainly for several reasons:

1. Security considerations:

Default , the Oracle listening service is not configured to start automatically. This helps prevent unauthorized access since an attacker would need to manually start the service to establish a connection.

2. Performance optimization:

In some cases, the automatically started listening service may start for no reason at system startup, even if there is no incoming connection request. This consumes unnecessary system resources, especially on resource-constrained systems. Manual startup ensures that the service only starts when needed.

3. Management flexibility:

When the listening service is configured as manual, the database administrator can decide when to start and stop the service as needed. This provides greater control, allowing administrators to stop services during maintenance or troubleshooting without affecting other applications or services.

4. Security Audit:

By setting the listening service to manual, administrators can better track and audit when it starts and stops. This helps identify unauthorized access attempts and improves overall security posture.

5. Save resources:

On systems that do not need to monitor connections, manually starting the listening service can save system resources, such as CPU and memory. This is especially important for smaller systems such as servers or virtual machines.

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