You install Tableau Server on a server that has four processor cores. How many instances of each Tableau Server process are installed?

During a standard single-node installation, Tableau Server installs one instance of each of its core processes by default. This initial configuration provides a fully functional server. The number of processor cores (in this case, four) is a critical factor for performance and scalability, but it does not alter the default count of one instance per process during the initial setup. Administrators can later manually configure additional instances of specific processes, such as the VizQL Server or Backgrounder, to optimize performance based on the server's hardware and workload, but the default is one of each.

A. 2: This is incorrect. While an administrator might add a second instance of a process like VizQL Server on a four-core machine for better performance, it is not the default count for all processes.

C. 8: This is incorrect. There is no default configuration rule that installs eight instances of each process on a four-core server.

D. 4: This is incorrect. The number of process instances does not default to matching the number of CPU cores for every process. This would be an inefficient configuration for single-instance processes like the Gateway.

1. Tableau Server Help (Official Vendor Documentation): "Tableau Server Processes". The documentation describes the function of each process. In the section on configuring nodes, it is established that the initial setup on a single machine installs a single instance of each process. For example, the "Configure Initial Node Settings" guide states: "By default, Tableau Server installs one instance of each process on the initial node..." This confirms the default behavior is to start with one of each.

Reference Location: Tableau Server Help > Administrator Guide > Configure > Configure Initial Node Settings.

2. Tableau Server Help (Official Vendor Documentation): "Performance Tuning". This section explains that administrators should adjust the number of process instances after installation based on hardware specifications like CPU cores. It states, "For most processes, we recommend running no more than one instance on a given computer... However, you can configure more than one instance of the most resource-intensive processes..." This implies the default is one, and increasing the count is a deliberate tuning action.

Reference Location: Tableau Server Help > Administrator Guide > Performance > Performance Tuning.