Which of the following is NOT a pre-defined workload pool in Splunk?

In Splunk, workload pooling is a method used to allocate and manage resources effectively for different types of users and their search activities. Workload pools are pre-defined settings that allow administrators to control and distribute the computational resources available to different search types based on their requirements.

The three pre-defined workload pools in Splunk are High, Standard, and Low. These pools are designed to provide varying levels of resource allocation depending on the urgency and priority of the search queries. For instance, High workload pools are intended for time-sensitive queries that require immediate attention and resource availability, while the Low pool is suitable for less urgent tasks that need fewer resources.

The option listed as Medium does not exist as a pre-defined workload pool within Splunk's framework. Thus, it stands out as the correct answer to the question because it is not part of the system's default configurations for managing workload. This distinction highlights the function of workload pools in facilitating the efficient handling of search requests and optimizing the performance of the Splunk environment based on user needs.