Your right, but i want to disable cache because i got some wierd behaviour on the page:
i got a context containig admin dashboard.
to build a navigation displaying elements count for each page, (elements are stored in an custom DB) i update a TV (alias *count) for every page through a Snippet (alias setCount) calling a Snippet (alias CountElements) that counts xPDOObjects (::getCollection) on every page. These TV data is used to build the navigation. I do so, because the DB can only be manipulated within the specific page.
[[!setCount? &id=`resId` &value=`[[!CountElements? &parent=`parentId`]]`]]
instead of the actual TV value a cached one is displayed.

why?