Once content cache areas have been created for a site, they can be associated with the servers in that site. Content cache areas can be shared between servers, or each server can have its own content cache area. The mapping between a content cache area and a server instance/virtual server/site is done in the content cache configuration tab on each of these objects:
To assign a content cache area
NOTE If the content cache settings are inherited from another object, the content cache will be read-only. To edit the content cache area, select the Override inherited settings checkbox.