DNS BIND Periodic (Time controlled) Statements

 cleaning-interval minutes;

cleaning-interval defines the time in MINUTES when all expired records will be deleted. The default is 60 (1 hour), if specified as 0 NO cleaning will be performed. The maximum value is 40320 (28 days). This statement may be used in a view or a global options clause.

 heartbeat-interval minutes;

heartbeat-interval defines the time in MINUTES when zones marked as dialup are updated. The default is 60 (1 hour), if specified as 0 NO updating will be performed. The maximum value is 40320 (28 days). This statement may be used in a view or a global options clause.

 interface-interval minutes;

interface-interval defines the time in MINUTES when scan all interfaces on the server and will begin to listen on new interfaces (assuming they are not prevented by a listen-on option) and stop listening on interfaces which no longer exist. The default is 60 (1 hour), if specified as 0 NO interface scan will be performed. The maximum value is 40320 (28 days). This option may only be specified in a 'global' options statement.

 statistics-interval number;

statistics-interval is NOT YET IMPLEMENTED IN BIND 9.