Celery Beat 2.8.1 causes DB CPU to max out

[josephetareh]

After upgrading celery beat from 2.7.0 to 2.8.1, my database seems to start getting spammed with requests from celery beat. I only have a few tasks running each day and I've had celery beat running on this project for over 3 years without any issue so not sure what exactly is causing this. pg_stat_activity did show that this query seemed to be the root of the issue but isn't this just the regular celery beat query that's meant to run regularly. Maybe the interval was increased?

SELECT "django_celery_beat_periodictask"."id", "django_celery_beat_periodictask"."name", "django_celery_beat_periodictask"."task", "django_celery_beat_periodictask"."interval_id", "django_celery_beat_periodictask"."crontab_id", "django_celery_beat_periodictask"."solar_id", "django_celery_beat_periodictask"."clocked_id", "django_celery_beat_periodictask"."args", "django_celery_beat_periodictask"."kwargs", "django_celery_beat_periodictask"."queue", "django_celery_beat_periodictask"."exchange", "django_celery_beat_periodictask"."routing_key", "django_celery_beat_periodictask"."headers", "django_celery_beat_periodictask"."priority", "django_celery_beat_periodictask"."expires", "django_celery_beat_periodictask"."expire_seconds", "django_celery_beat_periodictask"."one_off", "django_celery_beat_periodictask"."start_time", "django_celery_beat_periodictask"."enabled", "django_celery_beat_periodictask"."last_run_at", "django_celery_beat_periodictask"."total_run_count", "django_celery_beat_periodictask"."date_changed",

Not sure if anything was changed recently or if there's any setting I was meant to upgrade post 2.7.0. I've added the insights charts here to show how serious the spike was.

Thanks.

The rise happens after upgrading to 2.8.1 and then falls after downgrading to 2.7.0