Currently it is:

DEFAULT_LOG_FORMAT = "%(filename)-25s %(lineno)4d %(levelname)-8s %(message)s"

I think name (module name) would be very useful here, instead of just the base filename.

(It might also be good to have the relative path there (maybe at the end), but it is usually still very long (but e.g. $VIRTUAL_ENV could be substituted therein))

Currently it would look like this:

utils.py                   114 DEBUG    (0.000) SELECT "app_url"."id", "app_url"."created", "app_url"."url" FROM "app_url" WHERE "app_url"."id" = 2; args=(2,)
multipart.py               604 DEBUG    Calling on_field_start with no data

Using DEFAULT_LOG_FORMAT = "%(levelname)-8s %(name)s:%(filename)s:%(lineno)d %(message)s" instead:

DEBUG    django.db.backends:utils.py:114 (0.000) SELECT "app_url"."id", "app_url"."created", "app_url"."url" FROM "app_url" WHERE "app_url"."id" = 2; args=(2,)
DEBUG    multipart.multipart:multipart.py:604 Calling on_field_start with no data