title: What is the practical effect of viewPager.setOffscreenPageLimit(3);?
body: <p>I have three pages and have set Page Limit to 3.</p>
  
  <pre><code>  mViewPager.setOffscreenPageLimit(3);
  </code></pre>
  
  <p>What is the practical effect of this? Does it improve performance much or can it cause memory consumption issues?</p>