This read-only Unsigned32 reports how many traffic conditioners, metering and policing resources, are currently reserved and in use on the device. This tells an admin how much of a finite hardware resource for rate-limiting and policing rules has already been allocated, which matters before adding more policer-based rules. For example, seeing this value near the platform's known traffic-conditioner limit warns the admin that adding another rate-limiting rule may fail due to resource exhaustion.