SystemMetric enum

system.* metric instruments from the OpenTelemetry semantic conventions.

Inheritance

• Object
• Enum
• SystemMetric

Implemented types

• OTelMetric

Available extensions

• EnumName

Values

systemCpuFrequency → const SystemMetric

Operating frequency of the logical CPU in Hertz.

Stability: development

const SystemMetric('system.cpu.frequency', SemanticInstrument.gauge, 'Hz')

systemCpuLogicalCount → const SystemMetric

Reports the number of logical (virtual) processor cores created by the operating system to manage multitasking.

Stability: development

const SystemMetric('system.cpu.logical.count', SemanticInstrument.upDownCounter, '{cpu}')

systemCpuPhysicalCount → const SystemMetric

Reports the number of actual physical processor cores on the hardware.

Stability: development

const SystemMetric('system.cpu.physical.count', SemanticInstrument.upDownCounter, '{cpu}')

systemCpuTime → const SystemMetric

Seconds each logical CPU spent on each mode.

Stability: development

const SystemMetric('system.cpu.time', SemanticInstrument.counter, 's')

systemCpuUtilization → const SystemMetric

For each logical CPU, the utilization is calculated as the change in cumulative CPU time (cpu.time) over a measurement interval, divided by the elapsed time.

Stability: development

const SystemMetric('system.cpu.utilization', SemanticInstrument.gauge, '1')

systemDiskIo → const SystemMetric

Disk bytes transferred.

Stability: development

const SystemMetric('system.disk.io', SemanticInstrument.counter, 'By')

systemDiskIoTime → const SystemMetric

Time disk spent activated.

Stability: development

const SystemMetric('system.disk.io_time', SemanticInstrument.counter, 's')

systemDiskLimit → const SystemMetric

The total storage capacity of the disk.

Stability: development

const SystemMetric('system.disk.limit', SemanticInstrument.upDownCounter, 'By')

systemDiskMerged → const SystemMetric

The number of disk reads/writes merged into single physical disk access operations.

Stability: development

const SystemMetric('system.disk.merged', SemanticInstrument.counter, '{operation}')

systemDiskOperationTime → const SystemMetric

Sum of the time each operation took to complete.

Stability: development

const SystemMetric('system.disk.operation_time', SemanticInstrument.counter, 's')

systemDiskOperations → const SystemMetric

Disk operations count.

Stability: development

const SystemMetric('system.disk.operations', SemanticInstrument.counter, '{operation}')

systemFilesystemLimit → const SystemMetric

The total storage capacity of the filesystem.

Stability: development

const SystemMetric('system.filesystem.limit', SemanticInstrument.upDownCounter, 'By')

systemFilesystemLockCount → const SystemMetric

Filesystem lock counts.

Stability: development

const SystemMetric('system.filesystem.lock.count', SemanticInstrument.upDownCounter, '{lock}')

systemFilesystemUsage → const SystemMetric

Reports a filesystem's space usage across different states.

Stability: development

const SystemMetric('system.filesystem.usage', SemanticInstrument.upDownCounter, 'By')

systemFilesystemUtilization → const SystemMetric

Fraction of filesystem bytes used.

Stability: development

const SystemMetric('system.filesystem.utilization', SemanticInstrument.gauge, '1')

systemLinuxMemoryAvailable → const SystemMetric

The number of packets transferred.

Stability: development

const SystemMetric('system.linux.memory.available', SemanticInstrument.counter, '{packet}')

systemLinuxMemorySlabUsage → const SystemMetric

The number of packets transferred.

Stability: development

const SystemMetric('system.linux.memory.slab.usage', SemanticInstrument.counter, '{packet}')

systemMemoryLimit → const SystemMetric

Total virtual memory available in the system.

Stability: development

const SystemMetric('system.memory.limit', SemanticInstrument.upDownCounter, 'By')

systemMemoryLinuxAvailable → const SystemMetric

An estimate of how much memory is available for starting new applications, without causing swapping.

Stability: development

const SystemMetric('system.memory.linux.available', SemanticInstrument.upDownCounter, 'By')

systemMemoryLinuxHugepagesLimit → const SystemMetric

Total number of hugepages available.

Stability: development

const SystemMetric('system.memory.linux.hugepages.limit', SemanticInstrument.upDownCounter, '{page}')

systemMemoryLinuxHugepagesPageSize → const SystemMetric

System hugepage size in bytes.

Stability: development

const SystemMetric('system.memory.linux.hugepages.page_size', SemanticInstrument.upDownCounter, 'By')

systemMemoryLinuxHugepagesReserved → const SystemMetric

Number of reserved hugepages.

Stability: development

const SystemMetric('system.memory.linux.hugepages.reserved', SemanticInstrument.upDownCounter, '{page}')

systemMemoryLinuxHugepagesSurplus → const SystemMetric

Number of surplus hugepages.

Stability: development

const SystemMetric('system.memory.linux.hugepages.surplus', SemanticInstrument.upDownCounter, '{page}')

systemMemoryLinuxHugepagesUsage → const SystemMetric

Number of hugepages in use by state.

Stability: development

const SystemMetric('system.memory.linux.hugepages.usage', SemanticInstrument.upDownCounter, '{page}')

systemMemoryLinuxHugepagesUtilization → const SystemMetric

Percentage of hugepages in use by state.

Stability: development

const SystemMetric('system.memory.linux.hugepages.utilization', SemanticInstrument.gauge, '1')

systemMemoryLinuxShared → const SystemMetric

Shared memory used (mostly by tmpfs).

Stability: development

const SystemMetric('system.memory.linux.shared', SemanticInstrument.upDownCounter, 'By')

systemMemoryLinuxSlabUsage → const SystemMetric

Reports the memory used by the Linux kernel for managing caches of frequently used objects.

Stability: development

const SystemMetric('system.memory.linux.slab.usage', SemanticInstrument.upDownCounter, 'By')

systemMemoryShared → const SystemMetric

Deprecated, use system.memory.linux.shared instead.

Stability: development

const SystemMetric('system.memory.shared', SemanticInstrument.upDownCounter, 'By')

systemMemoryUsage → const SystemMetric

Reports memory in use by state.

Stability: development

const SystemMetric('system.memory.usage', SemanticInstrument.upDownCounter, 'By')

systemMemoryUtilization → const SystemMetric

Percentage of memory bytes in use.

Stability: development

const SystemMetric('system.memory.utilization', SemanticInstrument.gauge, '1')

systemNetworkConnectionCount → const SystemMetric

The number of connections.

Stability: development

const SystemMetric('system.network.connection.count', SemanticInstrument.upDownCounter, '{connection}')

systemNetworkConnections → const SystemMetric

Deprecated, use system.network.connection.count instead.

Stability: development

const SystemMetric('system.network.connections', SemanticInstrument.upDownCounter, '{connection}')

systemNetworkDropped → const SystemMetric

Count of packets that are dropped or discarded even though there was no error.

Stability: development

const SystemMetric('system.network.dropped', SemanticInstrument.counter, '{packet}')

systemNetworkErrors → const SystemMetric

Count of network errors detected.

Stability: development

const SystemMetric('system.network.errors', SemanticInstrument.counter, '{error}')

systemNetworkIo → const SystemMetric

The number of bytes transmitted and received.

Stability: development

const SystemMetric('system.network.io', SemanticInstrument.counter, 'By')

systemNetworkPacketCount → const SystemMetric

The number of packets transferred.

Stability: development

const SystemMetric('system.network.packet.count', SemanticInstrument.counter, '{packet}')

systemNetworkPacketDropped → const SystemMetric

Count of packets that are dropped or discarded even though there was no error.

Stability: development

const SystemMetric('system.network.packet.dropped', SemanticInstrument.counter, '{packet}')

systemNetworkPackets → const SystemMetric

The number of packets transferred.

Stability: development

const SystemMetric('system.network.packets', SemanticInstrument.counter, '{packet}')

systemPagingFaults → const SystemMetric

The number of page faults.

Stability: development

const SystemMetric('system.paging.faults', SemanticInstrument.counter, '{fault}')

systemPagingOperations → const SystemMetric

The number of paging operations.

Stability: development

const SystemMetric('system.paging.operations', SemanticInstrument.counter, '{operation}')

systemPagingUsage → const SystemMetric

Unix swap or windows pagefile usage.

Stability: development

const SystemMetric('system.paging.usage', SemanticInstrument.upDownCounter, 'By')

systemPagingUtilization → const SystemMetric

Swap (unix) or pagefile (windows) utilization.

Stability: development

const SystemMetric('system.paging.utilization', SemanticInstrument.gauge, '1')

systemProcessCount → const SystemMetric

Total number of processes in each state.

Stability: development

const SystemMetric('system.process.count', SemanticInstrument.upDownCounter, '{process}')

systemProcessCreated → const SystemMetric

Total number of processes created over uptime of the host.

Stability: development

const SystemMetric('system.process.created', SemanticInstrument.counter, '{process}')

systemUptime → const SystemMetric

The time the system has been running.

Stability: development

const SystemMetric('system.uptime', SemanticInstrument.gauge, 's')

Properties

hashCode → int

The hash code for this object.

no setter, inherited

index → int

A numeric identifier for the enumerated value.

no setter, inherited

instrument → SemanticInstrument

The OTel instrument kind the spec assigns to this metric.

final

name → String

The on-wire metric name (e.g. http.server.request.duration).

final

name → String

Available on Enum, provided by the EnumName extension

The name of the enum value.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

unit → String

OTel unit string (UCUM-style: s for seconds, By for bytes, {request} for a counted entity, 1 for dimensionless).

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

values → const List<SystemMetric>

A constant List of the values in this enum, in order of their declaration.