title: pricing encrypting RDS with KMS
body: <p>i want to encrypt my RDS instance from Amazon Web Service but i dont know the explanation of the pricing.</p>
  
  <p>It says that each API request of AWS Key Management Service costs $0.03 per 10,000 requests.</p>
  
  <p>Every query means an API request or every connection ? </p>
  
  <p>Hope you can help me.</p>