Django and/or psycopg memory leak

Make a simple task

@shared_task
def foo():
    Event.objects.all().count()

for _ in range(50000): foo.delay()

Watch celery memory go up. top -p pgrep -d "," celery`

Things that don't matter

• prefork, thread
• DEBUG is false
• CONN_MAX_AGE or not
• Python 3.11 vs 3.10
• Docker vs virt env

Workaround: Remove the psycopg-c package. The memory leak is gone.