title: What does X-Accel-Limit-Rate really do in NginX?
body: <p><a href="http://wiki.nginx.org/X-accel#X-Accel-Limit-Rate" rel="nofollow noreferrer">These are the docs for X-Accel-Limit-Rate</a>:</p>
  <blockquote>
  <p>Sets the rate limit for this single request. Off means unlimited.</p>
  </blockquote>
  <p>Not much there. Most of the examples (I've found only two or three) I've seen set the value of X-Accel-Limit-Rate to 1024. This is obviously 1024 bytes, but per what? Or is that a total of some sort?</p>
  <p>Without knowing what the value means it's difficult to know what it's <em>really</em> doing.</p>