Thread:Talk:MediaWiki/How many Wiki pages can Media Wiki hande?/reply (2)

You can handle millions of pages, but you'll need to do more on the server side to keep things running. You'll need to start doing things like adding more advanced caching systems, moving to dedicated hosting, having a server specifically for storing the database(s), and doing stuff on the wiki to improve performance, such as restricting editing of frequently templates to reduce the server load. 4,500 pages is nothing for MediaWiki. Unless you're getting a lot of visitors already, you probably won't need much of a caching system. You'll want to have PHP caching though, just to give a slight speed increase.