Nginx – Does uwsgi workers share a common memory ? [ With Nginx ]

djangofilesystemsnginxuwsgiweb-server

I have configured my Nginx with Django uwsgi.

When the django server starts, it reads a 5MB file from the hard-disk.

Now,
Without Nginx with Django default server

python manage.py runserver => Runs immediately and starts serving pages.

Problem:

With Nginx as the server

It takes very long time and several HTTP 504 before it start serving pages.

So, How does uwsgi workers work with Nginx ?

I have:

4 Workers
512 Threads each

So, is the 5MB file getting read 512 * 4 times ?

Is there a possible work around for this in Nginx / Uwsgi ?

A total of 2048 threads ??? Are you sure you have the resources to maintains such a beast ? You will need to heavy tune your kernel too.

By the way if you read the file in the WSGI entry point it will be read only on startup (and then forked()).

Ensure you aren't using embedded mode. Use daemon mode instead. See:

for an explanation of why embedded mode is bad for constrained memory environments.

BTW, also ditch mod_python and use a more up to date mod_wsgi, specifically mod_wsgi 3.X and set:

WSGIRestrictEmbedded On

in addition to using daemon mode to get even more memory savings.

Tell him to start with simple configs and then tune them:

As soon as an app in simple http mode works, he can start adding integration with nginx.

After that he can starts real tuning adding processes and monitoring functions.

From what i can see it looks like he is starting in dynamic mode that is a really complex topic (and 99% of the time unneeded)