This read-create value sets the maximum number of mini-slots that may be requested for a single upstream transmission by a service using this QoS profile, with zero meaning there is no limit. Admins use this to bound how large a single upstream burst from one service flow can be, which affects fairness and latency for other flows sharing the channel. For example, an admin worried that a bulk-data service class could monopolize upstream mini-slots in one burst would set a finite cwdIfQosProfMaxTxBurst to force it to spread large transfers across multiple grants.