Since MOSS 2007 publishing sites have had a special type of cache known as the object cache. This cache is used to speed up navigation, cross-list queries, and other publishing operations by not constantly having to hit the DB for each request. The cache is scoped at the site collection and Site Collection Administrators have the ability to change several settings related the cache’s operation. One in particular is the max amount of memory which SharePoint will allow the cache to grow. Playing with this setting you may be surprised to learn SharePoint allows this value to range from 1 MB up to 10 TB! Yep, SharePoint allows Site Collection Administrators with a publishing site to set their object cache up to 10 TB for each Site Collection for which they are an administrator.