title: Linux process virtual memory column in TOP/HTOP
body: <p>I wrote a C++ process which is running inside a VMWare machine with a 512Mb of assigned RAM.</p>
  
  <p>I see by TOP/HTOP that the VIRT column shows a value of 490Mb. Instead other processes show few Kbytes for the same field.</p>
  
  <p>Do you know why? Have I to setup something for my process?</p>
  
  <p>Thank you very much!</p>