poolsize 5 example

poolSize-5.js

var MongoClient = require('mongodb').MongoClient;    
    
var URI = 'mongodb://localhost/test';    
var options = { server : { poolSize : 5 } };

MongoClient.connect(URI, options,           
  function(err, db) {  
    
    //Create arbitrary long operation  
    db.eval('function (x) { while(x<10000000000){x++;} }',[0], { nolock: true }, function(err, result){
      console.log("done slow");    
    });        
    
    db.collection('testing').findOne({ test: 1 }, function (err, doc){    
      console.log("done fast");                               
    });                   
    
    console.log("yo");                                                            
});