Moving task_manager items to a real cron system?

UPDATE ibf_task_manager SET task_enabled=0 WHERE task_application NOT IN ('core','forums','members','calendar')

In a 20 minute time frame, this query was executed 4,576 times accounting for 21% of all INSERT, UPDATE, DELETE queries made to our system. ibf_task_manager has only 22 rows that never match this query.

Can we move this, and other task executions, from a page view check to run from our system crontab? We are on 3.1.4 now and moving to 3.2.3 in late November.