Long Pages vs. Many Pages

[TommyKnoker]

Hello! Not sure if this is the place to post but it seems topical...
For search engine optimization, and user experience, what is the general concensus on using really long pages vs. breaking it up into many pages.
I can understand that if you want to boost page views, you may want to break up long content into many pages, but is this better or worse for both search engine ranking and user experience.
Is there some optimium page length for websites?

[megri]

The Question is that there should be unique contents page may be long or many pages