title: What is different between "pager" and "Lazy swapper"?
body: <p>I'm reading a book, <code>operating system concepts</code> (written by abraham silberschatz), in chapter 9 <code>virtual memory</code>, there are terms <code>Lazy swapper</code> and <code>pager</code>.</p>
  
  <p>I can't figure out what is different between <code>Lazy swapper</code> and <code>pager</code>.</p>
  
  <p>Swapper is just doing the entire process into memory, whereas lazy swapper is doing swapping a page rather than entire process.</p>
  
  <p>Is it pager?</p>