Disk Statistics

Plugin: proc.plugin Module: /proc/diskstats

Overview

Detailed statistics for each of your system's disk devices and partitions. The data is reported by the kernel and can be used to monitor disk activity on a Linux system.

Get valuable insight into how your disks are performing and where potential bottlenecks might be.

This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.

Default Behavior

Auto-Detection

This integration doesn't support auto-detection.

Limits

The default configuration for this integration does not impose any limits on data collection.

Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.

Setup

Prerequisites

No action required.

Configuration

Options

There are no configuration options.

via File

There is no configuration file.

Examples

There are no configuration examples.

Alerts

The following alerts are available:

Alert name	On metric	Description
10min_disk_backlog	disk.backlog	average backlog size of the ${label:device} disk over the last 10 minutes
10min_disk_utilization	disk.util	average percentage of time ${label:device} disk was busy over the last 10 minutes

Metrics

Metrics grouped by scope.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.

Per Disk Statistics instance

This scope has no labels.

Metrics:

Metric	Description	Dimensions	Unit
system.io	Disk I/O	in, out	KiB/s

Per disk

Labels:

Label	Description
device	Kernel-assigned name of the block device (for example sda, nvme0n1, or fd0). This is a device name, not a mount-point path.
mount_point	Directory where the device's filesystem is mounted (for example /, /run, /dev, or /dev/shm). Shows [none] for devices that are not mounted.
device_type	How Netdata classifies the device: physical (a real disk), partition (a slice of a physical disk), virtual (a logical or software-backed device such as LVM or device-mapper), or unknown.

Metrics:

Metric	Description	Dimensions	Unit
disk.io	Disk I/O Bandwidth	reads, writes	KiB/s
disk_ext.io	Amount of Discarded Data	discards	KiB/s
disk.ops	Disk Completed I/O Operations	reads, writes	operations/s
disk_ext.ops	Disk Completed Extended I/O Operations	discards, flushes	operations/s
disk.qops	Disk Current I/O Operations	operations	operations
disk.backlog	Disk Backlog	backlog	milliseconds
disk.busy	Disk Busy Time	busy	milliseconds
disk.util	Disk Utilization Time	utilization	% of time working
disk.mops	Disk Merged Operations	reads, writes	merged operations/s
disk_ext.mops	Disk Merged Discard Operations	discards	merged operations/s
disk.iotime	Disk Total I/O Time	reads, writes	milliseconds/s
disk_ext.iotime	Disk Total I/O Time for Extended Operations	discards, flushes	milliseconds/s
disk.await	Average Completed I/O Operation Time	reads, writes	milliseconds/operation
disk_ext.await	Average Completed Extended I/O Operation Time	discards, flushes	milliseconds/operation
disk.avgsz	Average Completed I/O Operation Bandwidth	reads, writes	KiB/operation
disk_ext.avgsz	Average Amount of Discarded Data	discards	KiB/operation
disk.svctm	Average Service Time	svctm	milliseconds/operation