title: What is the max size of 'max_length' in Django?
body: <p>This is my model:</p>
  
  <pre><code>class Position(models.Model):
      map = models.ForeignKey(Map,primary_key=True)
      #members=models.CharField(max_length=200)
      LatLng = models.CharField(max_length=40000)
      infowindow = models.CharField(max_length=40000)
  </code></pre>
  
  <p>But it can't run. What is the max size of the <code>max_length</code> parameter?</p>