Alcatel-Lucent 7950 Quality Of Service Manual page 163

Service Egress and Ingress QoS Policies
There is no specific limit on the number of queues that can be monitored but the amount of each
line card CPU's resources allocated to the monitoring is bounded, consequently average polling
interval will increase as more queues are monitored on the line card.
If the MBS of a queue is modified, the occupancy information is cleared and the elapsed timers
reset to zero. Issuing a clear card will also clear this information. Note that packet drops caused at
the pool level, rather than at the queue level, would result in lower queue depths being reported.
7950 XRS Quality of Service Guide Page 163