django quickstart can trigger excessive disk io when it hits memory limits

Issue

https://github.com/openshift/django-ex results in subtantially more memory consumption than the assumed '10M'.

This means that running on a shared platform where the memory/cpu ratio may
seem strange due to memory quotas (for example '8' CPUs but '512M' RAM) we
can end up spawning far more workers than we have memory for. Resulting in
new workers being constantly killed, and high disk IO usage as the workers
keep respawning.