As long as your tests don't rely on any data migrations, you can set MIGRATIONS_MODULES['app'] = None for all apps in a test settings file as described in https://docs.djangoproject.com/en/stable/ref/settings/#std:setting-MIGRATION_MODULES to disable migrations while testing. There's a ticket to make that a bit easier: https://code.djangoproject.com/ticket/25388
On Saturday, August 6, 2016 at 6:07:04 AM UTC-4, andrea crotti wrote: > > > Ok great thanks for the answer Markus. > And yes I can try to help, it's quite a big issue for us.. > Anything else we can do to improve the situation in the meanwhile? > > In general I was wondering why do we need to handle all the "baggage" of > supporting backward migrations and doing things 100% properly while running > migrations just for tests. > > I think that in general if there was just a way to render all the SQL that > needs to be run statically for tests it would be great. > > On Friday, August 5, 2016 at 11:07:56 AM UTC+1, andrea crotti wrote: >> >> We have a very big Django project with > 100 apps and > 300 models. >> We had some massive issues with Django 1.8 and migrations, which would >> take forever and just take all the computer memory after a while. >> >> Now with Django 1.9 things improved, however we are again back with some >> extremely bad performances and massive memory usages (up to 8GB of RAM for >> example), sometimes just to run ONE single migration. >> >> It's not even entirely deterministic though sometimes killing the process >> and doing it again just works. >> >> I'm attaching the profile graph (done wtith gprof2dot) from running >> "./manage migrate" and one thing that clearly looks bad is that *render* >> for example is called 44355 times, which is definitively not normal. >> >> Any idea about about what we can do about this and what could be the >> problem? >> I have the impression that it's related with the amount of models and how >> they are interconnected, and mabye some caching would avoid all this extra >> computation. >> >> Noone else has similar issues? >> Thanks >> > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/12fedb8c-7f16-45c2-acf2-39a34d5f8af7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
