Explanation/Reference:
Explanation:
Oracle Database Resource Manager (the Resource Manager) is an infrastructure that provides granular control of database resources allocated to users, applications, and services. The Resource Manager solves many resource allocation problems that an operating system does not manage well, including:
Excessive overhead

Inefficient scheduling

Inappropriate allocation of resources

Inability to manage database-specific resources

The Resource Manager helps overcome these problems by giving the database more control over allocation of hardware resources and enabling you to prioritize work within the database. You can classify sessions into groups based on session attributes, and then allocate resources to these groups to optimize hardware utilization.