Admin interface: fixed or dragging layout

Question

User interface

I 'm inventing my bike admin interface and the question arose: to make a fixed page width or stretching. I looked at various options for ready-made systems and made sure that I do everything differently. But with stretching layout and at high screen resolutions, it turns out that form elements (especially selects) are stretched to obscene sizes, and text fields contain paragraphs of text in one line.
Again, with a fixed layout, the page turns into a “brick” in the center of the screen.

Answer 1

There is a third option with adaptive layout
A good example: habrahabr.ru/post/144003/
That is, we make it essentially fixed but for several predefined permissions.
Might be of interest. Truth fuss more.

Answer 2

I like it like this:

.wrapper
{
  width: 100%;
  max-width: 1400px;
}

Answer 3

So no one bothers to forcibly reduce the size of elements that look bad if they stretch too much. The main thing is to think over the design well.
But in general, I like admin panels more with rubber layout on the whole page. I will note, for example, ucoz.