Metrics specifications

This article is an explanation of the metrics which will be displayed in the host details screen as well as in the service details screen.

System metrics

Metrics automatically collected / posted by installing / launching mackerel-agent.

Linux

There are six types of graphs which will be displayed: loadavg, cpu, memory, disk, interface, and filesystem. The following are the metric values which will be graphed by each.

  • loadavg(line graph)
    • loadavg1
    • loadavg5
    • loadavg15
  • cpu(stacked graph)
    • cpu.user.percentage
    • cpu.iowait.percentage
    • cpu.system.percentage
    • cpu.idle.percentage
    • cpu.nice.percentage
    • cpu.irq.percentage
    • cpu.softirq.percentage
    • cpu.steal.percentage
    • cpu.guest.percentage
  • memory(stacked graph. memory.total, swap_total, swap_used, and swap_cached are line graphs)
    • Kernel 3.14 or later for Linux
      • memory.used
      • memory.available
      • memory.total
      • memory.swap_used
      • memory.swap_cached
      • memory.swap_total
    • Other Linux
      • memory.free
      • memory.buffers
      • memory.cached
      • memory.used
      • memory.total
      • memory.swap_used
      • memory.swap_cached
      • memory.swap_total
  • disk（line graph）
    • disk.*.reads.delta
    • disk.*.writes.delta
  • interface（line graph）
    • interface.*.rxBytes.delta (受信バイト数)
    • interface.*.txBytes.delta (送信バイト数)
  • filesystem（line graph）
    • filesystem.*.size
    • filesystem.*.used

Windows

There are six types of graphs which will be displayed: processor queue length, cpu, memory, disk, interface, and filesystem. The following are the metric values which will be graphed by each.

  • processor queue length（line graph）
    • processor_queue_length
  • cpu（stacked graph）
    • cpu.user.percentage
    • cpu.system.percentage
    • cpu.idle.percentage
  • memory（stacked graph. memory.total, pagefile_free, and pagefile_total are line graphs）
    • memory.free
    • memory.used
    • memory.total
    • memory.pagefile_free
    • memory.pagefile_total
  • disk(line graph)
    • disk.*.reads.delta
    • disk.*.writes.delta
  • interface(line graph)
    • interface.*.rxBytes.delta　(the number of bytes received)
    • interface.*.txBytes.delta　(the number of bytes sent)
  • filesystem(line graph)
    • filesystem.*.size
    • filesystem.*.used

User-defined metrics (Custom metrics)

  • custom.foo(.bar)*.*
    • Metrics which have the same name up to the last dot in the name will be collected together and displayed in one graph.

Custom metrics sent from mackerel-agent are attached with the prefix custom. (from version 0.6.1). We recommend adding custom. even when using the API directly because standard metrics may now be added with the mackerel-agent update. See also Posting user-defined custom metrics.