One More - Scheduled Downtime Across Nagios Restarts

It seems some machines on Scheduled Downtime get put back into active monitiooring if I restart Nagios. What is the key to this? Is it the persistent checkbox on the Scheduled Downtime admin page? This is very problematic for me 0- I have better than 800 machines being monitored and at any given time 15 or 20 of them are in Sched. Downtime. I scramble if I have to restart…

Thanks

Joe