title: What does "Anonymous VM" in allocations instruments signify?
body: <p>I get frequent memory warnings in my application but I don't know why. 
  Here is the snapshot of allocation instruments. </p>
  
  <p><img src="https://i.stack.imgur.com/LPAbg.png" alt="Instruments"></p>
  
  <p>I know that we don't have any control over virtual memory assigned to us but I am trying to understand what information does that number 26.50 MB means for a developer. </p>
  
  <pre>
   1. What does a high VM means ? Does it lead to a jetsam ? Is that cause of any other concern ?
   2. Is this value dependent on device ?
   3. Does a low vm means that your app is memory efficient 
   4. Does a high VM leads to memory warnings in your app ?
   5. What cause this value to change ? 
   6. What steps should a developer take when they see a high vm for their app (like 300 MB) ? 
   7. Is VM tracker instrument related to this value ?
  
  </pre>