hwLswSysMemoryUsed 1.3.6.1.4.1.43.45.1.2.23.1.18.1.15

The system memory in use. Note that the system memory means the memory can be used by the software platform. For the distributed device, it represents the memory size on the master slot. If the amount of used memory exceeds 4,294,967,295 bytes, the value remains 4,294,967,295 bytes.