Linux System Metrics
system.cpu.idle: % Idle CPU
system.cpu.system: % System CPU
system.cpu.user: % User CPU
system.disk.free: Disk free, in bytes.
system.disk.user: Total disk space, in bytes.
system.disk.total: Total disk space, in bytes.
system.disk.in_use: % Disk in use.
system.io.r_s: The number of read requests to the device per second.
system.io.rkb_s: The number of kBs of reads per second.
system.io.w_s: The number of write requests to the device per second.
system.io.wkb_s: The number of kBs of writes per second.
system.io.await: The average time (in milliseconds) for I/O requests issued to the device to be served. This includes the time spent by the requests in queue and the time spent servicing them.
system.io.util: Percentage of CPU time during which I/O requests were issued to the device (bandwidth utilization for the device). Device saturation occurs when this value is close to 100%.
system.mem.free: Free system memory (in bytes)
system.mem.used: Used system memory (in bytes)
system.mem.total: Total system memory (in bytes)
system.net.bytes_rcvd: The number of bytes received on a device per second.
system.net.bytes_sent: The number of bytes sent from a device per second.