For a fresh MOSS Administrator like me, it's very important to know the maximum capacity of sharepoint objects like lists, libraries, pages, sites, users etc and to get the optimum performance benefit upto these limits. Limits that are used over here are can be used to design a portal or a farm to get the best out of MOSS 2007 and crossing this limit may cause MOSS 2007 to create performance bottlenecks: Site collections (Database scope) : 50000 Web sites (Web site scope) : 2000 Web sites (Site collection) : 250000 (Nested Subsites) Documents (Folder scope) : 2000 Documents (Library scope) : 2 million (Nested Folders) Users ( Web site scope) : 2 million Items (List scope) : 2000 Web Parts (Page scope) : 100 Web Part personalization (Page scope) : 10000 Document size (File scope) : 50 MB (2 GB if WSS SP1 is applied) Checkout this link: http://blogs.msdn.com/bgeoffro/archive/2008/03/19/list-atta...