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add experimental go runtime metrics semantic conventions
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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: go | ||
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| # A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`). | ||
| note: Add new go namespace for Go runtime 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: [535] | ||
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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: Go Runtime | ||
| ---> | ||
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| # Semantic Conventions for Go Runtime Metrics | ||
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| **Status**: [Experimental][DocumentStatus] | ||
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| This document describes semantic conventions for Go runtime 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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| - [Go Memory](#go-memory) | ||
| - [Metric: `go.memory.used`](#metric-gomemoryused) | ||
| - [Metric: `go.memory.limit`](#metric-gomemorylimit) | ||
| - [Metric: `go.memory.allocated`](#metric-gomemoryallocated) | ||
| - [Metric: `go.memory.allocations`](#metric-gomemoryallocations) | ||
| - [Go Garbage Collection](#go-garbage-collection) | ||
| - [Metric: `go.memory.gc.target`](#metric-gomemorygctarget) | ||
| - [Metric: `go.memory.gc.user_target`](#metric-gomemorygcuser_target) | ||
| - [Go Threads](#go-threads) | ||
| - [Metric: `go.thread.limit`](#metric-gothreadlimit) | ||
| - [Go Scheduler](#go-scheduler) | ||
| - [Metric: `go.schedule.duration`](#metric-goscheduleduration) | ||
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| <!-- tocstop --> | ||
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| ## Go Memory | ||
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| **Description:** Go runtime metrics captured under the namespace `go.memory.*` | ||
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| ### Metric: `go.memory.used` | ||
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| This metric is [recommended][MetricRecommended]. | ||
| This metric is obtained from Go's [`runtime/metrics`][RuntimeMetrics] package. | ||
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| <!-- semconv metric.go.memory.used(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Runtime Source | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | -------------- | --------- | | ||
| | `go.memory.used` | UpDownCounter | `By` | Virtual memory mapped by the Go runtime | various `memory/classes` metrics | ![Experimental][ExperimentalIcon] | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.go.memory.used(full) --> | ||
| | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | | ||
| |---|---|---|---|---|---| | ||
| | `go.memory.type` | string | The type of memory. | `released`; `stack`; `other`; | `Recommended` | ![Experimental][ExperimentalIcon] | | ||
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| `go.memory.type` MUST be one of the following: | ||
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| | Value | Description | Runtime Source | Stability | | ||
| |---|---|---|---| | ||
| | `released` | Memory that is completely free and has been returned to the underlying system. | `/memory/classes/heap/released:bytes` | ![Experimental][ExperimentalIcon] | | ||
| | `stack` | Memory allocated from the heap that is reserved for stack space, whether or not it is currently in-use. | `/memory/classes/heap/stacks:bytes` | ![Experimental][ExperimentalIcon] | | ||
| | `other` | All memory mapped by the Go runtime into the current process as read-write, excluding other categories of memory usage. | `/memory/classes/total:bytes` (excluding released and stack) | ![Experimental][ExperimentalIcon] | | ||
| <!-- endsemconv --> | ||
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| ### Metric: `go.memory.limit` | ||
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| This metric is [recommended][MetricRecommended]. | ||
| This metric is obtained from Go's [`runtime/metrics`][RuntimeMetrics] package. | ||
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| <!-- semconv metric.go.memory.limit(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Runtime Source | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | -------------- | --------- | | ||
| | `go.memory.limit` | UpDownCounter | `By` | Go runtime memory limit configured by the user, otherwise math.MaxInt64. | `/gc/gomemlimit:bytes` | ![Experimental][ExperimentalIcon] | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.go.memory.limit(full) --> | ||
| <!-- endsemconv --> | ||
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| ### Metric: `go.memory.allocated` | ||
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| This metric is [recommended][MetricRecommended]. | ||
| This metric is obtained from Go's [`runtime/metrics`][RuntimeMetrics] package. | ||
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| <!-- semconv metric.go.memory.allocated(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Runtime Source | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | -------------- | --------- | | ||
| | `go.memory.allocated` | Counter | `By` | Memory allocated to the heap by the application | `/gc/heap/allocs:bytes` | ![Experimental][ExperimentalIcon] | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.go.memory.allocated(full) --> | ||
| <!-- endsemconv --> | ||
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| ### Metric: `go.memory.allocations` | ||
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| This metric is [recommended][MetricRecommended]. | ||
| This metric is obtained from Go's [`runtime/metrics`][RuntimeMetrics] package. | ||
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| <!-- semconv metric.go.memory.allocations(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Runtime Source | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | -------------- | --------- | | ||
| | `go.memory.allocations` | Counter | `{allocation}` | Count of allocations to the heap by the application | `/gc/heap/allocs:objects` | ![Experimental][ExperimentalIcon] | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.go.memory.allocations(full) --> | ||
| <!-- endsemconv --> | ||
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| ## Go Garbage Collection | ||
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| **Description:** Go metrics captured under the namespace `go.memory.gc.*` | ||
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| ### Metric: `go.memory.gc.target` | ||
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| This metric is [recommended][MetricRecommended]. | ||
| This metric is obtained from Go's [`runtime/metrics`][RuntimeMetrics] package. | ||
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| <!-- semconv metric.go.memory.target(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Runtime Source | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | -------------- | --------- | | ||
| | `go.memory.target` | UpDownCounter | `By` | Heap size target for the end of the GC cycle. | `/gc/heap/goal:bytes` | ![Experimental][ExperimentalIcon] | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.go.memory.target(full) --> | ||
| <!-- endsemconv --> | ||
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| ### Metric: `go.memory.gc.user_target` | ||
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| This metric is [recommended][MetricRecommended]. | ||
| This metric is obtained from Go's [`runtime/metrics`][RuntimeMetrics] package. | ||
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| <!-- semconv metric.go.memory.user_target(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Runtime Source | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | -------------- | --------- | | ||
| | `go.memory.user_target` | UpDownCounter | `By` | Heap size target for the end of the GC cycle. | `/gc/gogc:percent` | ![Experimental][ExperimentalIcon] | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.go.memory.user_target(full) --> | ||
| <!-- endsemconv --> | ||
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| ## Go Threads | ||
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| **Description:** Go metrics captured under the namespace `go.thread.*` | ||
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| ### Metric: `go.thread.limit` | ||
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| This metric is [recommended][MetricRecommended]. | ||
| This metric is obtained from Go's [`runtime/metrics`][RuntimeMetrics] package. | ||
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| <!-- semconv go.thread.limit(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Runtime Source | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | -------------- | --------- | | ||
| | `go.thread.limit` | UpDownCounter | `By` | The number of OS threads that can execute user-level Go code simultaneously. | `/sched/gomaxprocs:threads` | ![Experimental][ExperimentalIcon] | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv go.thread.limit(full) --> | ||
| <!-- endsemconv --> | ||
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| ## Go Scheduler | ||
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| **Description:** Go metrics captured under the namespace `go.schedule.*` | ||
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| ### Metric: `go.schedule.duration` | ||
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| This metric is [recommended][MetricRecommended]. | ||
| This metric is obtained from Go's [`runtime/metrics`][RuntimeMetrics] package. | ||
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| <!-- semconv metric.go.schedule.duration(metric_table) --> | ||
| | Name | Instrument Type | Unit (UCUM) | Description | Runtime Source | Stability | | ||
| | -------- | --------------- | ----------- | -------------- | -------------- | --------- | | ||
| | `go.schedule.duration` | Histogram | `s` | Distribution of the time goroutines have spent in the scheduler in a runnable state before actually running. | `/sched/latencies:seconds` | ![Experimental][ExperimentalIcon] | | ||
| <!-- endsemconv --> | ||
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| <!-- semconv metric.go.schedule.duration(full) --> | ||
| <!-- 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 | ||
| [RuntimeMetrics]: https://pkg.go.dev/runtime/metrics | ||
| [ExperimentalIcon]: https://img.shields.io/badge/-experimental-blue |