How to run celery cam to save memory by not loading all modules of your app

run_celery_cam.py

import os
import time
from copy import copy

from celery.events.snapshot import evcam

from qiwichain import settings as novtest_settings
from qiwichain.celery import app

DATABASES = copy(novtest_settings.DATABASES)
if 'postgis' in DATABASES['default']['ENGINE']:
    # Just my case, postgis asks for additional libraries, but it's not needed here
    DATABASES['default']['ENGINE'] = 'django.db.backends.postgresql_psycopg2'

from django.conf import settings

settings.configure(
    INSTALLED_APPS=(
        'djcelery',
    ),
    TIME_ZONE=novtest_settings.TIME_ZONE,
    DATABASES=DATABASES,
    CACHES={
        'default': {
            'BACKEND': 'django.core.cache.backends.dummy.DummyCache',
        }
    }
)

if hasattr(time, 'tzset'):
    # Check that it's not development server on Windows
    os.environ['TZ'] = settings.TIME_ZONE
    time.tzset()

if __name__ == '__main__':
    import django

    django.setup()
    evcam(camera='djcelery.snapshot.Camera', app=app, loglevel='INFO', freq=1)