title: mongodb and php: connection pooling
body: <p>I'm using the native driver in PHP to connect to a mongo DB.</p>
  
  <p>I don't understand the concept of connection pooling: is this like a 'pool' of connections, and when a user opens the website, a connection is pulled from this pool and used?</p>
  
  <p>But what if you have multiple pages with some code that uses a mongoDB? Will the system pull a new connection from the pool every time the user changes the page?</p>
  
  <p>In general: how can I manage this 'connection pool' (or is it managed automatically) when there are a lot of simultaneous connections?</p>