Use prefetch_related in DatabaseScheduler.all_as_schedule

[jahazieldom]

Summary:

We use django-celery-beat in a multi-tenant application, we have 20K rows of periodic tasks (each tenant has its own periodic tasks), but when any task is created, updated or deleted the method DatabaseScheduler.all_as_schedule it takes a long time to be processed, i think you could use self.Model.objects.enabled().prefetch_related("interval", "crontab", "solar", "clocked") and with that it significantly reduces the processing time.

The problem we are having is that many periodic tasks are not executed in due time.

Versions

celery==5.2.7
django-celery-beat==2.4.0

[auvipy]

I thinkk we should consider this for all the models that will be benefited from prefetch_related