Thank you guys for your answers. I didn't want to be rough.
Let's imagine that you have:
latest articles on main page
list of related articles on several other pages
one full article page
If you'll update just one page (article) it would affect all other connected pages. That's rather more than just one user issue.
Captain Earth: Saving a page is not a problem, because it happens not so often and doesn't affect guest users (who is the most part of audience)
Hero Member: It's more simplier for me to tell editor do not save page too fast than ask him to crawl all over pages affected by one edited article. I don't understand why are you talking about free tool, because i needed to buy ProCache for using it.
Sorry, i didn't notice that it is not ProCache thread.