Django Server Killed - django

Question

I am running Django 1.6 with a custom user model. The user model inherits AbstractBaseUser, PermissionsMixin and works fine. It let's me call login() and authenticate() and when I do syncdb it creates it with no errors and will allow me to create a superuser in the command line interface.
I am trying to use the Django admin panel. I can access /admin/ fine and login and it will display the list of registered models.
I can modify all models, with the exception of "user". I can click the "user" model and see a list of users, however if I try and add a new user or edit an existing user, the request will take approximately 1 minute and then the django web server will exit with the message "Killed".
I would post some code however I have no idea what would be relevant because the error is so vague.
Is there another error log somewhere I can find out more details?
Edit:
Custom user model code:
class User(AbstractBaseUser, PermissionsMixin):
id = models.AutoField(primary_key=True)
full_name = models.CharField("Full Name", max_length=100)
email_address = models.CharField(max_length=255, unique=True, db_index=True)
company_name = models.CharField(max_length=50, blank=True, null=True)
time_zone = models.CharField(max_length=50, blank=True, null=True)
activation_key = models.CharField(unique=True, max_length=50, blank=True, null=True)
location = models.ForeignKey(Location, related_name='fk_user_2_country', blank=True, null=True)
username = models.CharField(max_length=20, blank=True, null=True, unique=True)
is_staff = models.BooleanField(default=False)
class Meta:
db_table = 'user'
USERNAME_FIELD = 'email_address'
objects = UserManager()
REQUIRED_FIELDS = ['full_name',]
def get_full_name(self):
return self.email_address
def get_short_name(self):
return self.email_address
def activate_email(self, activation_key):
if self.activation_key == activation_key:
self.activation_key = None
self.save()
return True
else:
return False
def __unique__(self):
return self.email_address
def is_active(self):
return self.activation_key is None

Answer 1

This was caused by the relationship to the "Location" table location = models.ForeignKey(Location, related_name='fk_user_2_country', blank=True, null=True).
This table contained 3.3 Million rows, the Django admin panel was trying to list them all and as a result was crashing.