Device descriptions that are automatically created by the system also may be automatically deleted by the system. The default is to delete devices that were automatically created after 1440 minutes (24 hours) if they have not been used in that time period.
Specifying the default has the potential side-effect of having device descriptions deleted over the weekend. This can cause a system slow-down. For example, when users reconnect on monday morning (after a 48-hour period of system inactivity), they may discover that they need to re-create their device descriptions.
You may want to have the AUTODLTDEV parameter default to a value larger than 24 hours; 72 hours may be more appropriate to cover weekends. Use a model controller to change this value for an autocreated controller description.
The default value for devices that are attached to automatically created APPN virtual controllers is 10,000 minutes.