This is a gauge reporting the highest number of data buffers that have been in use on this specific board since the last reset, applicable to 6500 platforms. This per-board peak lets an admin identify which specific board in a multi-board 6500 chassis has historically come closest to exhausting its buffer allocation, informing which board, rather than the whole node, might need its buffer allocation increased or its port load rebalanced. For example, one board's peak buffer usage sitting at 99% of its allocation while every other board in the chassis peaks around 60% would identify that one board as the target for load rebalancing.