title: MongoDB timeout issue (Node.js)
body: <p>I have an application in Node.JS which basically retrieves a snapshot of data from a WebAPI each 30 minutes.
  When I try to interrogate the database by using an aggregate query, the app triggers an error related to timeout (MongoError: connection 1 to 127.0.0.1:27017 timed out). From my logs I see that it's exactly 30 seconds.
  The aggregate query is something like this:</p>
  
  <pre><code>collection.aggregate([{
              "$group": {
                  "_id": {
                      country: "$country",
                      user: "$user"
                  }
              }
          }]).
  </code></pre>
  
  <p>I tested the query on a different client (but the same database) and it takes aprox 60 seconds for 25.000.000 records. My assumption is that there is a timeout parameter with the value of 30 seconds that blocks my application from finish the query.
  Can someone tell me how can I set this parameter up in Node.JS? I'm using 'mongodb' js library and my host machine is Windows.</p>
  
  <p>Since this is a personal project I wanted to investigate how can I use MongoDB instead of a more traditional solution, such as Oracle or MySQL, but this might be a deal breaker since analytics is a core part of the entire application.</p>