Disk Metrics

Every 10 seconds, the collectd service uses the disk plugin to gather the following disk metrics on each node in the cluster.

Name Description Additional Tag(s)
disk.disk_await The average time in milliseconds to complete I/O requests. This includes the time request are waiting in queue and the time spent processing the request. This metric is available as of MEP 3.0.
  • disk_name: Display values for a specified disk.
disk.disk_avg_requests_size The average size in kilobytes for I/O requests issued to the disk. This metric is available as of MEP 3.0.
  • disk_name: Display values for a specified disk.
disk.disk_avg_queue_size The average number of requests issued to the disk. This metric is available as of MEP 3.0.
  • disk_name: Display values for a specified disk.
disk.disk_io_time.io_time The disk I/O time in milliseconds (ms).
  • disk_name: Display values for a specified disk.
disk.disk_io_time.weighted_io_time The aggregate time in milliseconds (ms) spent on I/O operations that are either in progress or have completed
  • disk_name: Display values for a specified disk.
disk.disk_merged.read The number of physical read operations.
  • disk_name: Display values for a specified disk.
disk.disk_merged.write The number of physical write operations.
  • disk_name: Display values for a specified disk.
disk.disk_octets.read The number of bytes read from disk.
  • disk_name: Display values for a specified disk.
disk.disk_octets.write The number of bytes written to disk.
  • disk_name: Display values for a specified disk.
disk.disk_ops.read The number of completed read operations.
  • disk_name: Display values for a specified disk.
disk.disk_ops.write The number of completed write operations.
  • disk_name: Display values for a specified disk.
disk.disk_time.read The average time in milliseconds(ms) to read from disk.
  • disk_name: Display values for a specified disk.
disk.disk_time.write The average time in milliseconds(ms) to write to disk.
  • disk_name: Display values for a specific disk.
disk.disk_utilization The disk utilization percentage. This metric is available as of MEP 3.0.
  • disk_name: Display values for a specific disk.
disk.pending_operations The number of pending disk operations.
  • disk_name: Display values for a specific disk.