This read-only INTEGER defines the number of buffers in the shared-memory interface available for transferring user messages through this MTS instance. An admin cares because this is the fixed capacity ceiling for message transfer, and running out of buffers causes messages to be dropped. For example, an admin comparing this value to the rate of buffer-exhaustion events (mtsNumberOfRcvNoBufs) can judge whether the configured buffer count is adequate for current traffic.