How to scroll correctly?

Question

Layout

the simplest case is a text column that needs to be scrolled

, the width of a fixed-size column, let's say 50%

, that is, to the left and right of the column there are fields on which static content that does not need to be scrolled - for example, banners

where scrolling is allowed - on the left edge of the page or on the left edge of the block column text?
Or are both options acceptable?
Or is one of them non-comme il faut?