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Add node.js runtime metrics semantic conventions
Fixes #990 Signed-off-by: maryliag <[email protected]>
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| # Use this changelog template to create an entry for release notes. | ||
| # | ||
| # If your change doesn't affect end users you should instead start | ||
| # your pull request title with [chore] or use the "Skip Changelog" label. | ||
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| # One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix' | ||
| change_type: new_component | ||
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| # The name of the area of concern in the attributes-registry, (e.g. http, cloud, db) | ||
| component: nodejs | ||
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| # A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`). | ||
| note: Introducing semantic conventions for Node.js specific metrics. | ||
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| # Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists. | ||
| # The values here must be integers. | ||
| issues: [990] | ||
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| # (Optional) One or more lines of additional information to render under the primary note. | ||
| # These lines will be padded with 2 spaces and then inserted directly into the document. | ||
| # Use pipe (|) for multiline entries. | ||
| subtext: |
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| <!--- Hugo front matter used to generate the website version of this page: | ||
| linkTitle: Node.js | ||
| ---> | ||
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| # Semantic Conventions for Node.js Metrics | ||
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| **Status**: [Experimental][DocumentStatus] | ||
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| This document describes semantic conventions for Node.js metrics in OpenTelemetry. | ||
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| <!-- Re-generate TOC with `markdown-toc --no-first-h1 -i` --> | ||
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| <!-- toc --> | ||
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| - [Experimental](#experimental) | ||
| - [Metric: `nodejs.active_handles.count`](#metric-nodejsactive_handlescount) | ||
| - [Metric: `nodejs.active_requests.count`](#metric-nodejsactive_requestscount) | ||
| - [Metric: `nodejs.eventloop.lag`](#metric-nodejseventlooplag) | ||
| - [Metric: `nodejs.gc.duration`](#metric-nodejsgcduration) | ||
| - [Metric: `nodejs.memory.size`](#metric-nodejsmemorysize) | ||
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| <!-- tocstop --> | ||
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| ## Experimental | ||
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| **Status**: [Experimental][DocumentStatus] | ||
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| **Description:** Experimental Node.js metrics captured under `nodejs.` | ||
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| ### Metric: `nodejs.active_handles.count` | ||
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| This metric is [recommended][MetricRecommended]. | ||
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| <!-- semconv metric.nodejs.active_handles.count(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | --------- | | ||
| | `nodejs.active_handles.count` | UpDownCounter | `{handles}` | Number of active handles. |  | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.nodejs.active_handles.count(full) --> | ||
| | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | | ||
| |---|---|---|---|---|---| | ||
| | `nodejs.version` | string | Node.js version. | `v22.0.0`; `v21.7.3` | `Recommended` |  | | ||
| <!-- endsemconv --> | ||
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| ### Metric: `nodejs.active_requests.count` | ||
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| This metric is [recommended][MetricRecommended]. | ||
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| <!-- semconv metric.nodejs.active_requests.count(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | --------- | | ||
| | `nodejs.active_requests.count` | UpDownCounter | `{requests}` | Number of active requests. |  | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.nodejs.active_requests.count(full) --> | ||
| | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | | ||
| |---|---|---|---|---|---| | ||
| | `nodejs.version` | string | Node.js version. | `v22.0.0`; `v21.7.3` | `Recommended` |  | | ||
| <!-- endsemconv --> | ||
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| ### Metric: `nodejs.eventloop.lag` | ||
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| This metric is [recommended][MetricRecommended]. | ||
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| <!-- semconv metric.nodejs.eventloop.lag(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | --------- | | ||
| | `nodejs.eventloop.lag` | Histogram | `s` | Event loop lag. |  | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.nodejs.eventloop.lag(full) --> | ||
| | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | | ||
| |---|---|---|---|---|---| | ||
| | `nodejs.version` | string | Node.js version. | `v22.0.0`; `v21.7.3` | `Recommended` |  | | ||
| <!-- endsemconv --> | ||
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| ### Metric: `nodejs.gc.duration` | ||
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| This metric is [recommended][MetricRecommended]. | ||
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| <!-- semconv metric.nodejs.gc.duration(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | --------- | | ||
| | `nodejs.gc.duration` | Histogram | `s` | Garbage collection duration. |  | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.nodejs.gc.duration(full) --> | ||
| | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | | ||
| |---|---|---|---|---|---| | ||
| | `nodejs.gc.name` | string | Name of the garbage collector. | `G1 Young Generation`; `G1 Old Generation` | `Recommended` |  | | ||
| | `nodejs.version` | string | Node.js version. | `v22.0.0`; `v21.7.3` | `Recommended` |  | | ||
| <!-- endsemconv --> | ||
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| ### Metric: `nodejs.memory.size` | ||
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| This metric is [recommended][MetricRecommended]. | ||
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| <!-- semconv metric.nodejs.memory.size(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | --------- | | ||
| | `nodejs.memory.size` | UpDownCounter | `By` | Memory size. |  | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.nodejs.memory.size(full) --> | ||
| | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | | ||
| |---|---|---|---|---|---| | ||
| | `nodejs.memory.state` | string | The state of memory. | `total`; `used` | `Recommended` |  | | ||
| | `nodejs.memory.type` | string | The type of memory. | `heap`; `external` | `Recommended` |  | | ||
| | `nodejs.version` | string | Node.js version. | `v22.0.0`; `v21.7.3` | `Recommended` |  | | ||
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| `nodejs.memory.state` MUST be one of the following: | ||
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| | Value | Description | Stability | | ||
| |---|---|---| | ||
| | `total` | Total memory. |  | | ||
| | `used` | Used memory |  | | ||
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| `nodejs.memory.type` MUST be one of the following: | ||
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| | Value | Description | Stability | | ||
| |---|---|---| | ||
| | `heap` | Heap memory. |  | | ||
| | `external` | External memory |  | | ||
| <!-- endsemconv --> | ||
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| [DocumentStatus]: https://github.com/open-telemetry/opentelemetry-specification/tree/v1.31.0/specification/document-status.md | ||
| [MetricRecommended]: /docs/general/metric-requirement-level.md#recommended |
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| groups: | ||
| - id: metric.nodejs.active_handles.count | ||
| type: metric | ||
| metric_name: nodejs.active_handles.count | ||
| brief: "Number of active handles." | ||
| extends: attributes.nodejs.version | ||
| instrument: updowncounter | ||
| unit: "{handles}" | ||
| stability: experimental | ||
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| - id: metric.nodejs.active_requests.count | ||
| type: metric | ||
| metric_name: nodejs.active_requests.count | ||
| brief: "Number of active requests." | ||
| extends: attributes.nodejs.version | ||
| instrument: updowncounter | ||
| unit: "{requests}" | ||
| stability: experimental | ||
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| - id: metric.nodejs.eventloop.lag | ||
| type: metric | ||
| metric_name: nodejs.eventloop.lag | ||
| brief: "Event loop lag." | ||
| extends: attributes.nodejs.version | ||
| instrument: histogram | ||
| unit: "s" | ||
| stability: experimental | ||
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| - id: metric.nodejs.gc.duration | ||
| type: metric | ||
| metric_name: nodejs.gc.duration | ||
| brief: "Garbage collection duration." | ||
| extends: attributes.nodejs.version | ||
| instrument: histogram | ||
| unit: "s" | ||
| stability: experimental | ||
| prefix: nodejs.gc | ||
| attributes: | ||
| - id: name | ||
| stability: experimental | ||
| type: string | ||
| requirement_level: recommended | ||
| brief: Name of the garbage collector. | ||
| examples: ["G1 Young Generation", "G1 Old Generation"] | ||
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| - id: metric.nodejs.memory.size | ||
| type: metric | ||
| metric_name: nodejs.memory.size | ||
| brief: "Memory size." | ||
| extends: attributes.nodejs.version | ||
| instrument: updowncounter | ||
| unit: "By" | ||
| stability: experimental | ||
| prefix: nodejs.memory | ||
| attributes: | ||
| - id: type | ||
| stability: experimental | ||
| type: | ||
| allow_custom_values: false | ||
| members: | ||
| - id: heap | ||
| value: 'heap' | ||
| brief: 'Heap memory.' | ||
| stability: experimental | ||
| - id: external | ||
| value: 'external' | ||
| brief: 'External memory' | ||
| stability: experimental | ||
| requirement_level: recommended | ||
| brief: The type of memory. | ||
| examples: ["heap", "external"] | ||
| - id: state | ||
| stability: experimental | ||
| type: | ||
| allow_custom_values: false | ||
| members: | ||
| - id: total | ||
| value: 'total' | ||
| brief: 'Total memory.' | ||
| stability: experimental | ||
| - id: used | ||
| value: 'used' | ||
| brief: 'Used memory' | ||
| stability: experimental | ||
| requirement_level: recommended | ||
| brief: The state of memory. | ||
| examples: ["total", "used"] |
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| groups: | ||
| - id: attributes.nodejs.version | ||
| type: attribute_group | ||
| brief: "Describes Node.js version attribute." | ||
| prefix: nodejs | ||
| attributes: | ||
| - id: version | ||
| stability: experimental | ||
| type: string | ||
| requirement_level: recommended | ||
| brief: Node.js version. | ||
| examples: ["v22.0.0", "v21.7.3"] |