According to the SAP-ingress QoS policy shown, queue 5 is configured with a maximum burst size (MBS) of 20 kilobytes and a committed burst size (CBS) of 10 kilobytes. In priority mode, the maximum amount of memory that queue 5 can use from the shared buffer pool is determined by the MBS parameter. Therefore, the maximum amount of memory that queue 5 can use from the shared buffer pool is 20 kilobytes.