title: Why to create custom indexes in raven db?
body: <p>I've started using RavenDb and I noticed that the RavenDb server creates custom indexes depending on my queries. If I use the same index several times (execute the same query) then the index will be permanently created.</p>
  
  <p>My question is why would I want to create a custom index from ny code if Raven is smart enought to create those indexes for me? </p>