Flask-SocketIO start_background_task() with Gunicorn workers

[GuyShalomCyberRidge]

Hey! 🐶
I have a background task that regularly updates a DB and sends data to the client. Currently start_background_task() runs in my create_app() function on init.

I'm trying to move from Flask Dev server & threads, to a Gunicorn & gevent configuration.
My problem comes when running Gunicorn with multiple workers.
Let's say I run 4 workers, now I have 4 background tasks running, all doing the same stuff and hogging my CPU usage. 😒

Is there a "correct" way of handling regular interval tasks like this?
Do I even have the right idea in using Gunicorn-gevent, or should I go for another approach instead?

Any help would be greatly appreciated!

[miguelgrinberg]

You should run your background task separately, not as part of your Flask application. That way it will be started independently from the web server and will not be affected by the horizontal scaling you want to do.