REST Resource: projects.metricDescriptors

Resource: MetricDescriptor

Defines a metric type and its schema. Once a metric descriptor is created, deleting or altering it stops data collection and makes the metric type's existing data unusable.

JSON representation
  "name": string,
  "type": string,
  "labels": [
  "metricKind": enum(MetricKind),
  "valueType": enum(ValueType),
  "unit": string,
  "description": string,
  "displayName": string,
  "metadata": {


The resource name of the metric descriptor.



The metric type, including its DNS name prefix. The type is not URL-encoded. All user-defined metric types have the DNS name or Metric types should use a natural hierarchical grouping. For example:




The set of labels that can be used to describe a specific instance of this metric type. For example, the metric type has a label for the HTTP response code, response_code, so you can look at latencies for successful responses or just for responses that failed.



Whether the metric records instantaneous values, changes to a value, etc. Some combinations of metricKind and valueType might not be supported.



Whether the measurement is an integer, a floating-point number, etc. Some combinations of metricKind and valueType might not be supported.



The unit in which the metric value is reported. It is only applicable if the valueType is INT64, DOUBLE, or DISTRIBUTION. The supported units are a subset of The Unified Code for Units of Measure standard:

Basic units (UNIT)

  • bit bit
  • By byte
  • s second
  • min minute
  • h hour
  • d day

Prefixes (PREFIX)

  • k kilo (10**3)
  • M mega (10**6)
  • G giga (10**9)
  • T tera (10**12)
  • P peta (10**15)
  • E exa (10**18)
  • Z zetta (10**21)
  • Y yotta (10**24)
  • m milli (10**-3)
  • u micro (10**-6)
  • n nano (10**-9)
  • p pico (10**-12)
  • f femto (10**-15)
  • a atto (10**-18)
  • z zepto (10**-21)
  • y yocto (10**-24)
  • Ki kibi (2**10)
  • Mi mebi (2**20)
  • Gi gibi (2**30)
  • Ti tebi (2**40)


The grammar also includes these connectors:

  • / division (as an infix operator, e.g. 1/s).
  • . multiplication (as an infix operator, e.g. GBy.d)

The grammar for a unit is as follows:

Expression = Component { "." Component } { "/" Component } ;

Component = ( [ PREFIX ] UNIT | "%" ) [ Annotation ]
          | Annotation
          | "1"

Annotation = "{" NAME "}" ;


  • Annotation is just a comment if it follows a UNIT and is equivalent to 1 if it is used alone. For examples, {requests}/s == 1/s, By{transmitted}/s == By/s.
  • NAME is a sequence of non-blank printable ASCII characters not containing '{' or '}'.
  • 1 represents dimensionless value 1, such as in 1/s.
  • % represents dimensionless value 1/100, and annotates values giving a percentage.



A detailed description of the metric, which can be used in documentation.



A concise name for the metric, which can be displayed in user interfaces. Use sentence case without an ending period, for example "Request count". This field is optional but it is recommended to be set for any metrics associated with user-visible concepts, such as Quota.



Optional. Metadata which can be used to guide usage of the metric.


The kind of measurement. It describes how the data is reported.

METRIC_KIND_UNSPECIFIED Do not use this default value.
GAUGE An instantaneous measurement of a value.
DELTA The change in a value during a time interval.
CUMULATIVE A value accumulated over a time interval. Cumulative measurements in a time series should have the same start time and increasing end times, until an event resets the cumulative value to zero and sets a new start time for the following points.


The value type of a metric.

VALUE_TYPE_UNSPECIFIED Do not use this default value.
BOOL The value is a boolean. This value type can be used only if the metric kind is GAUGE.
INT64 The value is a signed 64-bit integer.
DOUBLE The value is a double precision floating point number.
STRING The value is a text string. This value type can be used only if the metric kind is GAUGE.
DISTRIBUTION The value is a Distribution.
MONEY The value is money.


Additional annotations that can be used to guide the usage of a metric.

JSON representation
  "launchStage": enum(LaunchStage),
  "samplePeriod": string,
  "ingestDelay": string


The launch stage of the metric definition.


string (Duration format)

The sampling period of metric data points. For metrics which are written periodically, consecutive data points are stored at this time interval, excluding data loss due to errors. Metrics with a higher granularity have a smaller sampling period.


string (Duration format)

The delay of data points caused by ingestion. Data points older than this age are guaranteed to be ingested and available to be read, excluding data loss due to errors.


The launch stage as defined by Google Cloud Platform Launch Stages.

LAUNCH_STAGE_UNSPECIFIED Do not use this default value.
EARLY_ACCESS Early Access features are limited to a closed group of testers. To use these features, you must sign up in advance and sign a Trusted Tester agreement (which includes confidentiality provisions). These features may be unstable, changed in backward-incompatible ways, and are not guaranteed to be released.
ALPHA Alpha is a limited availability test for releases before they are cleared for widespread use. By Alpha, all significant design issues are resolved and we are in the process of verifying functionality. Alpha customers need to apply for access, agree to applicable terms, and have their projects whitelisted. Alpha releases don’t have to be feature complete, no SLAs are provided, and there are no technical support obligations, but they will be far enough along that customers can actually use them in test environments or for limited-use tests -- just like they would in normal production cases.
BETA Beta is the point at which we are ready to open a release for any customer to use. There are no SLA or technical support obligations in a Beta release. Products will be complete from a feature perspective, but may have some open outstanding issues. Beta releases are suitable for limited production use cases.
GA GA features are open to all developers and are considered stable and fully qualified for production use.
DEPRECATED Deprecated features are scheduled to be shut down and removed. For more information, see the “Deprecation Policy” section of our Terms of Service and the Google Cloud Platform Subject to the Deprecation Policy documentation.



Creates a new metric descriptor.


Deletes a metric descriptor.


Gets a single metric descriptor.


Lists metric descriptors that match a filter.
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