I'm thinking about changing the device refresh schedule from its default, which is 12 hours for full refresh. It seems to me that a 12-hour delay in assigning bundles to devices is terribly slow, but maybe there is a reason for this that I'm not aware of. With ZDM 7 I had device refresh set to 30 minutes and I didn't notice any bad effects.

I have one primary server managing ca 400 devices. CPU load on the server seems mostly nonexistent, but it does consume all 4 GB of memory that it has.

Is there some kind of 'best practice' for device refresh schedule?