title: Rails + Amazon RDS : latency issues
body: <p>I have an app whose database is being migrated to amazon RDS.</p>
  
  <p>I experienced a significant drop of performance, due to the latency of the queries between RDS and our server (like 30s of loading time only because of the queries). There is no explicit caching, and the requests could be optimized a bit more, but this is still more than 10x slower than with a local database.</p>
  
  <p>I this kind of performance drop expected? If yes, is there a way to use a cloud database with similar performances as a local one?</p>