Built-in Metrics

System

Metric ID	Description
system.uptime	Milliseconds since boot

CPU

Metric ID	Description
system.load.avg	Load average as reported by the system
system.load.cpu	CPU usage in the range [0.0, 1.0]
system.cpu.frequency	CPU frequency in MHz

Memory

Metric ID	Description
system.memory.totalSize	Total amount of memory space in bytes
system.memory.freeSize	Free amount of memory space in bytes
system.swap.totalSpaceSize	Total amount of swap space in bytes
system.swap.freeSpaceSize	Free amount of swap space in bytes

Network

Metric ID	Description
network.if.rate.bytes	Rate (bytes/second) of total traffic passing through this interface (rx+tx).
network.if.rate.bytes.rx	Rate (bytes/second) of received traffic on this interface.
network.if.rate.bytes.tx	Rate (bytes/second) of sent traffic on this interface.
network.if.rate.packets	Rate (packets/second) of total traffic for this interface (rx+tx).
network.if.rate.packets.rx	Rate (packets/second) of received packets on this interface.
network.if.rate.packets.tx	Rate (packets/second) of sent packets on this interface.
network.if.rate.errors	Rate (errors/second) of total errors for this interface (rx+tx).
network.if.rate.errors.rx	Rate (errors/second) of received errors on this interface.
network.if.rate.errors.tx	Rate (errors/second) of sent errors on this interface.
network.if.rate.dropped	Rate (dropped packets/second) for the entire interface (rx+tx).
network.if.rate.dropped.rx	Rate (dropped packets/second) of received packets on this interface.
network.if.rate.dropped.tx	Rate (dropped packets/second) of sent packets on this interface.

Each metric report will include the interface property, indicating the interface from which the metric was captured (e.g., vcan0, eth0, wlan0, etc.). Virtual and bridge interfaces are ignored.