This read-only Percent value reports the fraction of total device memory consumed by all defined memory regions combined. Admins use it as a mid-level breakdown between the overall utilization figure and the more specific heap and message-buffer ratios, useful for narrowing down where memory pressure originates. For example, a high nmsMemoryPoolRegionRatio alongside a low heap ratio would point an admin toward a non-heap memory region as the source of growing consumption.