title: Mongodb / Mongoose poolSize recommendation
body: <p>I am using mongoose in my nodejs application and I am wondering what I should set the poolSize to.  I know there is probably no hard and fast rule but maybe based on users and usage there is a general recommendation.</p>
  
  <p>I have left the poolSize left at the default which is 5.  At some point I can put the server under load and see how 5 performs.  I can then start really bumping it up maybe (100, 500, 1000, etc) to see what happens.  Anyone else try this yet and care to share?</p>