Memory leak in 1.6.1

G'day,

Since upgrading from 1.4 to 1.6.1 my app is consuming memory rather rapidly.

I have this issue on both my live Ubuntu 64bit server (python 2.7.5+, django 1.6.1) and on my development Windows 7 32bit (python 2.7.3, django 1.6.1)

After some diagnosis I have created a minimal test app that replicates this issue which I can replicate using both

SQLite and Postgresql (9.3, psycopyg2 2.5.2) either using the model manager or raw sql connection.

Here's my test model and test python app:

(I know that the two different test functions do not return the same objects - this is just test code)

---------------MODEL-----------------

from django.db import models

class Customer(models.Model):

    name = models.CharField(max_length=256,unique=True)

    class Meta:

        ordering = ["id"]

        app_label = 'app1'

--------------TEST-----------------

import os

import sys

SETTINGS  = "testsqlite.settings"

THE_PATH = r'D:\dev\django\testsqlite'

os.environ["DJANGO_SETTINGS_MODULE"] = SETTINGS

sys.path.append(THE_PATH)

from django.db import connection

from django.core.exceptions import ObjectDoesNotExist

from models import Customer

def GetCustomerSQL(name):

    cursor = connection.cursor()

    sql = "SELECT id FROM app1_customer WHERE name = '%s'" % name

    cursor.execute(sql)

    customer = cursor.fetchone()

    del cursor

    return customer

def GetCustomer(name):

    customer = None

    try:

        customer = Customer.objects.get(name=name)

    except ObjectDoesNotExist:

        pass

    return customer

while 1:

    #customer = GetCustomerSQL('Steve')

    customer = GetCustomer('Steve')

    del customer

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