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.

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	Dimensions	Unit
system.io	in, out	KiB/s

Per disk

Labels:

Label	Description
device	TBD
mount_point	TBD
device_type	TBD

Metrics:

Metric	Dimensions	Unit
disk.io	reads, writes	KiB/s
disk_ext.io	discards	KiB/s
disk.ops	reads, writes	operations/s
disk_ext.ops	discards, flushes	operations/s
disk.qops	operations	operations
disk.backlog	backlog	milliseconds
disk.busy	busy	milliseconds
disk.util	utilization	% of time working
disk.mops	reads, writes	merged operations/s
disk_ext.mops	discards	merged operations/s
disk.iotime	reads, writes	milliseconds/s
disk_ext.iotime	discards, flushes	milliseconds/s
disk.await	reads, writes	milliseconds/operation
disk_ext.await	discards, flushes	milliseconds/operation
disk.avgsz	reads, writes	KiB/operation
disk_ext.avgsz	discards	KiB/operation
disk.svctm	svctm	milliseconds/operation
disk.bcache_cache_alloc	ununsed, dirty, clean, metadata, undefined	percentage
disk.bcache_hit_ratio	5min, 1hour, 1day, ever	percentage
disk.bcache_rates	congested, writeback	KiB/s
disk.bcache_size	dirty	MiB
disk.bcache_usage	avail	percentage
disk.bcache_cache_read_races	races, errors	operations/s
disk.bcache	hits, misses, collisions, readaheads	operations/s
disk.bcache_bypass	hits, misses	operations/s

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
bcache_cache_dirty	disk.bcache_cache_alloc	percentage of cache space used for dirty data and metadata (this usually means your SSD cache is too small)
bcache_cache_errors	disk.bcache_cache_read_races	number of times data was read from the cache, the bucket was reused and invalidated in the last 10 minutes (when this occurs the data is reread from the backing device)

Setup

Prerequisites

No action required.

Configuration

File

There is no configuration file.

Options

There are no configuration options.

Examples

There are no configuration examples.