This fixlet will set command polling to once an hour only for clients that do not get UDP notifications:
Even with clients effectively doing a poll for commands every 6 hours during re-registration, it isn’t a bad idea to set all clients to use command polling for every 6 hours. It won’t cause them to do it more often, but it will set a ceiling. The primary impact of command polling is on the relays and not the root server, so it might be reasonable to set it to something like 3 hours on all clients, but I would start out conservatively and go from there.
Even computers that do receive UDP notifications normally will miss them when they are asleep or powered down.