title: How to clear cache in OpenVZ?
body: <p>I have OpenVZ VPS and have problem with clearing the cache:
  <img src="https://i.stack.imgur.com/dCskz.png" alt="enter image description here"></p>
  
  <p>In OpenVZ not work <code>echo 3 &gt; /proc/sys/vm/drop_caches</code>
  <img src="https://i.stack.imgur.com/tqJIr.png" alt="enter image description here"></p>
  
  <p>How may be this cache clear?</p>