title: Do in-memory databases reserve memory according to the defined field size or just the size of the data inside?
body: <p>I'm working with SAP HANA...</p>
  
  <p>Example</p>
  
  <p>NVARCHAR(4000)</p>
  
  <p>Data: ThisISaString</p>
  
  <p>Is the RAM that is being used = 4000 or 13?</p>
  
  <p>If it reserves 4000, then this space could really add up when you have alot of records.</p>
  
  <p>I am trying to decide how much of a buffer I should use for my text fields</p>