What Is Multitenant Architecture In Oracle 12C

What is Multitenant Architecture in Oracle 12c?

Oracle 12c is an enterprise-level, cloud computing platform that provides a comprehensive suite of features and tools for businesses to use. One of the capabilities of Oracle 12c is the ability to run in a multitenant architecture, which is a form of virtualization that enables multiple databases and applications to exist within a single instance of Oracle 12c. In this way, multitenancy allows businesses to more efficiently utilize the resources of their on-premises IT infrastructure without the associated overhead of running multiple instances of Oracle 12c.

A basic example of a multitenant architecture can be seen in a shared web-hosting platform. Each website “tenant” is running on the same physical hardware but in its own virtual environment that is isolated from the other tenants. In a similar way, Oracle 12c enables businesses to run databases and applications within their own “tenancy” on the same server, allowing them to maintain individual versions of their applications and databases while still enjoying the economies of scale provided by a single instance of Oracle 12c.

The primary advantage to deploying a multitenant architecture is scalability. By virtualizing an existing system, businesses can quickly add or remove tenants as their needs change. This advantage can be especially keen in cloud computing environments where businesses want to use the platform for both development and produduction purposes. With a multitenant architecture, businesses can easily deploy new applications or upgrade existing applications without impacting other tenants on the same system.

In addition to scalability, multitenant architectures provide a range of benefits from performance and security to cost savings. Applications and databases can be quickly deployed and upgraded in a multitenant architecture, thereby reducing the time and cost associated with configuring and maintaining multiple instances of Oracle 12c. Moreover, multitenancy can result in more efficient resource utilization, which can result in substantial cost savings. Finally, multitenancy can provide better performance due to the fact that there are fewer resources competing for attention on the system.

In terms of security, a multitenant architecture can allow businesses to partition data and applications in a way that reduces the risk of malicious attacks. Each tenant can be isolated from the other tenants, making it less likely that any one tenant can compromise the security of the entire system. Security policies can be implemented at the tenant level to further enhance the system’s level of security.

All in all, multitenant architectures can be an incredibly powerful tool for businesses that require the scalability, performance, and security provided by a robust cloud computing platform. While Oracle 12c is an enterprise-level solution, it can be deployed in a variety of architectures, including multitenancy. For businesses looking to get the most out of their IT infrastructure, a multitenant architecture powered by Oracle 12c may be the best way to go.


Multitenant architectures provide a number of advantages over traditional single-instance solutions, including scalability, cost savings, performance gains, and enhanced security. Scalability allows businesses to quickly and easily add or remove tenants as their needs change, while cost savings can be achieved with more efficient resource utilization due to fewer resources competing for attention on the system. Performance can be improved by allowing applications to be quickly deployed and upgraded and security can be stronger by isolating tenants from each other.

Additionally, multitenant architectures can enable organizations to better optimize their IT investments, as the same servers can be used to host multiple applications. This can reduce complexity in the IT infrastructure by reducing the number of servers required and create a more flexible system that can grow and adapt as needed.

Finally, multitenant architectures can enable organizations to take advantage of shared services and increased automation. By sharing resources between multiple tenants, organizations can unlock potential cost savings. In addition, automation can be used to manage the deployment of new applications and the removal of outdated ones, meaning less manual labor is required to maintain the system.


Despite the many advantages of multitenant architectures, there are some drawbacks. For example, multitenancy can lead to increased complexity when it comes to managing the system. As tenants add and remove applications and resources, system administrators must ensure that the resources are utilized optimally and that the system is secure.

In addition, multitenancy can create a risk of data breaches, as tenants share the same physical resources. If a security vulnerability is discovered on one tenant’s system, it could allow access to other tenant’s data and applications as well. System administrators must ensure that security measures are in place to prevent this from happening.

Finally, multitenancy can result in decreased performance due to resource contention between tenants. As the number of tenants increase, resources must be shared and contention can occur, leading to slower performance. System administrators must be vigilant in monitoring system performance to ensure that resources are optimized and performance is not impacted.


Deploying a multitenant architecture in Oracle 12c is relatively straightforward. Businesses can take advantage of the Oracle Universal Installer to deploy the instance and create custom deployments for each tenancy. The installer allows businesses to customize the installation of Oracle 12c according to their specific needs and requirements.

After the installation is complete, the instance can be configured for multitenancy. This involves assigning a unique identifier to each tenancy and configuring settings such as memory, storage, and networking. System administrators can also set resource limits to ensure that tenants do not monopolize the system’s resources.

Once the system is configured for multitenancy, tenants can begin deploying their applications and databases. Each tenant will have its own databases and applications, but these will be managed and secured through the multitenant architecture of Oracle 12c.

Finally, businesses will want to monitor the performance of their Oracle 12c instance. The instance should be regularly monitored to ensure that tenants are not monopolizing resources and that performance is not suffering. System administrators should also regularly check the system’s security to ensure that it is not vulnerable to malicious attacks.


In conclusion, multitenant architectures in Oracle 12c can be an incredibly powerful tool for businesses that need scalability, performance, and security in their cloud computing platform. The ability to virtualize an existing system can enable businesses to quickly and easily deploy new applications or upgrade existing applications without impacting other tenants on the system. Additionally, multitenancy can provide better performance, more efficient resource utilization, and enhanced security. While there are some risks and drawbacks to deploying a multitenant architecture, the overall benefits make it a compelling solution for businesses that need to get the most out of their IT investments.

Anita Johnson is an award-winning author and editor with over 15 years of experience in the fields of architecture, design, and urbanism. She has contributed articles and reviews to a variety of print and online publications on topics related to culture, art, architecture, and design from the late 19th century to the present day. Johnson's deep interest in these topics has informed both her writing and curatorial practice as she seeks to connect readers to the built environment around them.

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