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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:

MetricDimensionsUnit
system.ioin, outKiB/s

Per disk

Labels:

LabelDescription
deviceTBD
mount_pointTBD
device_typeTBD

Metrics:

MetricDimensionsUnit
disk.ioreads, writesKiB/s
disk_ext.iodiscardsKiB/s
disk.opsreads, writesoperations/s
disk_ext.opsdiscards, flushesoperations/s
disk.qopsoperationsoperations
disk.backlogbacklogmilliseconds
disk.busybusymilliseconds
disk.utilutilization% of time working
disk.mopsreads, writesmerged operations/s
disk_ext.mopsdiscardsmerged operations/s
disk.iotimereads, writesmilliseconds/s
disk_ext.iotimediscards, flushesmilliseconds/s
disk.awaitreads, writesmilliseconds/operation
disk_ext.awaitdiscards, flushesmilliseconds/operation
disk.avgszreads, writesKiB/operation
disk_ext.avgszdiscardsKiB/operation
disk.svctmsvctmmilliseconds/operation
disk.bcache_cache_allocununsed, dirty, clean, metadata, undefinedpercentage
disk.bcache_hit_ratio5min, 1hour, 1day, everpercentage
disk.bcache_ratescongested, writebackKiB/s
disk.bcache_sizedirtyMiB
disk.bcache_usageavailpercentage
disk.bcache_cache_read_racesraces, errorsoperations/s
disk.bcachehits, misses, collisions, readaheadsoperations/s
disk.bcache_bypasshits, missesoperations/s

Alerts

The following alerts are available:

Alert nameOn metricDescription
10min_disk_backlog disk.backlogaverage backlog size of the ${label:device} disk over the last 10 minutes
10min_disk_utilization disk.utilaverage percentage of time ${label:device} disk was busy over the last 10 minutes
bcache_cache_dirty disk.bcache_cache_allocpercentage 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_racesnumber 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.


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