The Cache Server provides a shared external query cache. It’s a cache of key/value pairs which hold information from previous queries to speed up future requests. To make Cache Server highly available, configure one or more Cache Server processes on multiple nodes of the cluster.

Process	Cache Server
Status	Status of the Cache Server process is visible on the Status Page. For more information, see View Server Process Status
Logging	Logs generated by the Cache Server process are located in C:\ProgramData\Tableau\Tableau Server\data\tabsvc\logs\cacheserver. For more information, see Tableau Server Logs and Log File Locations

What happens when Cache Server process goes down? The consequences are relatively mild. Tableau Server will still work but actions may take longer as they do not have cached results available. As the queries rerun, the restarted Cache Server gets repopulated, eventually speeding things up for end users. In effect, Cache Server does not have an availability impact; however, it does have an impact on various end user performance scenarios. To reduce impact on user performance, run multiple processes of this type across the cluster.

A failed Cache Server process is automatically restarted; as long as the computer itself is otherwise healthy, the Cache Server process will relaunch.