add namespace to jvm metric attributes

CHANGELOG.md

@@ -26,6 +26,25 @@ release.
   clients invoking them.
 - BREAKING: Rename all JVM metrics from `process.runtime.jvm.*` to `jvm.*`
   ([#241](https://github.com/open-telemetry/semantic-conventions/pull/241))
+- BREAKING: Add namespaces to JVM metric attributes ([#20](https://github.com/open-telemetry/semantic-conventions/pull/20)).
+  - Rename attributes `type` to `jvm.memory.type`, `pool` to `jvm.memory.pool.name`
+  - Applies to metrics:
+    - `jvm.memory.usage`
+    - `jvm.memory.init`
+    - `jvm.memory.committed`
+    - `jvm.memory.limit`
+    - `jvm.memory.usage_after_last_gc`
+  - Rename attributes `gc` to `jvm.gc.name`, `action` to `jvm.gc.action`
+  - Applies to metrics:
+    - `jvm.gc.duration`
+  - Rename attribute `daemon` to `thread.daemon`
+  - Applies to metrics:
+    - `jvm.threads.count`
+  - Rename attribute `pool` to `jvm.buffer.pool.name`
+  - Applies to metrics:
+    - `jvm.buffer.usage`
+    - `jvm.buffer.limit`
+    - `jvm.buffer.count`
 
 ## v1.21.0 (2023-07-13)
 

docs/general/attributes.md

@@ -368,6 +368,7 @@ a thread that started a span.
 |---|---|---|---|---|
 | `thread.id` | int | Current "managed" thread ID (as opposed to OS thread ID). | `42` | Recommended |
 | `thread.name` | string | Current thread name. | `main` | Recommended |
+| `thread.daemon` | boolean | Whether the thread is daemon or not. |  | Recommended |
 <!-- endsemconv -->
 
 Examples of where `thread.id` and `thread.name` can be extracted from:

docs/system/runtime-environment-metrics.md

@@ -91,12 +91,12 @@ This metric is obtained from [`MemoryPoolMXBean#getUsage()`](https://docs.oracle
 <!-- semconv metric.jvm.memory.usage(full) -->
 | Attribute  | Type | Description  | Examples  | Requirement Level |
 |---|---|---|---|---|
-| `type` | string | The type of memory. | `heap`; `non_heap` | Recommended |
-| `pool` | string | Name of the memory pool. [1] | `G1 Old Gen`; `G1 Eden space`; `G1 Survivor Space` | Recommended |
+| `jvm.memory.type` | string | The type of memory. | `heap`; `non_heap` | Recommended |
+| `jvm.memory.pool.name` | string | Name of the memory pool. [1] | `G1 Old Gen`; `G1 Eden space`; `G1 Survivor Space` | Recommended |
 
 **[1]:** Pool names are generally obtained via [MemoryPoolMXBean#getName()](https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/MemoryPoolMXBean.html#getName()).
 
-`type` MUST be one of the following:
+`jvm.memory.type` MUST be one of the following:
 
 | Value  | Description |
 |---|---|
@@ -118,12 +118,12 @@ This metric is obtained from [`MemoryPoolMXBean#getUsage()`](https://docs.oracle
 <!-- semconv metric.jvm.memory.committed(full) -->
 | Attribute  | Type | Description  | Examples  | Requirement Level |
 |---|---|---|---|---|
-| `type` | string | The type of memory. | `heap`; `non_heap` | Recommended |
-| `pool` | string | Name of the memory pool. [1] | `G1 Old Gen`; `G1 Eden space`; `G1 Survivor Space` | Recommended |
+| `jvm.memory.type` | string | The type of memory. | `heap`; `non_heap` | Recommended |
+| `jvm.memory.pool.name` | string | Name of the memory pool. [1] | `G1 Old Gen`; `G1 Eden space`; `G1 Survivor Space` | Recommended |
 
 **[1]:** Pool names are generally obtained via [MemoryPoolMXBean#getName()](https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/MemoryPoolMXBean.html#getName()).
 
-`type` MUST be one of the following:
+`jvm.memory.type` MUST be one of the following:
 
 | Value  | Description |
 |---|---|
@@ -145,12 +145,12 @@ This metric is obtained from [`MemoryPoolMXBean#getUsage()`](https://docs.oracle
 <!-- semconv metric.jvm.memory.limit(full) -->
 | Attribute  | Type | Description  | Examples  | Requirement Level |
 |---|---|---|---|---|
-| `type` | string | The type of memory. | `heap`; `non_heap` | Recommended |
-| `pool` | string | Name of the memory pool. [1] | `G1 Old Gen`; `G1 Eden space`; `G1 Survivor Space` | Recommended |
+| `jvm.memory.type` | string | The type of memory. | `heap`; `non_heap` | Recommended |
+| `jvm.memory.pool.name` | string | Name of the memory pool. [1] | `G1 Old Gen`; `G1 Eden space`; `G1 Survivor Space` | Recommended |
 
 **[1]:** Pool names are generally obtained via [MemoryPoolMXBean#getName()](https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/MemoryPoolMXBean.html#getName()).
 
-`type` MUST be one of the following:
+`jvm.memory.type` MUST be one of the following:
 
 | Value  | Description |
 |---|---|
@@ -172,12 +172,12 @@ This metric is obtained from [`MemoryPoolMXBean#getCollectionUsage()`](https://d
 <!-- semconv metric.jvm.memory.usage_after_last_gc(full) -->
 | Attribute  | Type | Description  | Examples  | Requirement Level |
 |---|---|---|---|---|
-| `type` | string | The type of memory. | `heap`; `non_heap` | Recommended |
-| `pool` | string | Name of the memory pool. [1] | `G1 Old Gen`; `G1 Eden space`; `G1 Survivor Space` | Recommended |
+| `jvm.memory.type` | string | The type of memory. | `heap`; `non_heap` | Recommended |
+| `jvm.memory.pool.name` | string | Name of the memory pool. [1] | `G1 Old Gen`; `G1 Eden space`; `G1 Survivor Space` | Recommended |
 
 **[1]:** Pool names are generally obtained via [MemoryPoolMXBean#getName()](https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/MemoryPoolMXBean.html#getName()).
 
-`type` MUST be one of the following:
+`jvm.memory.type` MUST be one of the following:
 
 | Value  | Description |
 |---|---|
@@ -204,8 +204,8 @@ of `[]` (single bucket histogram capturing count, sum, min, max).
 <!-- semconv metric.jvm.gc.duration(full) -->
 | Attribute  | Type | Description  | Examples  | Requirement Level |
 |---|---|---|---|---|
-| `gc` | string | Name of the garbage collector. [1] | `G1 Young Generation`; `G1 Old Generation` | Recommended |
-| `action` | string | Name of the garbage collector action. [2] | `end of minor GC`; `end of major GC` | Recommended |
+| `jvm.gc.name` | string | Name of the garbage collector. [1] | `G1 Young Generation`; `G1 Old Generation` | Recommended |
+| `jvm.gc.action` | string | Name of the garbage collector action. [2] | `end of minor GC`; `end of major GC` | Recommended |
 
 **[1]:** Garbage collector name is generally obtained via [GarbageCollectionNotificationInfo#getGcName()](https://docs.oracle.com/en/java/javase/11/docs/api/jdk.management/com/sun/management/GarbageCollectionNotificationInfo.html#getGcName()).
 
@@ -228,7 +228,7 @@ Note that this is the number of platform threads (as opposed to virtual threads)
 <!-- semconv metric.jvm.threads.count(full) -->
 | Attribute  | Type | Description  | Examples  | Requirement Level |
 |---|---|---|---|---|
-| `daemon` | boolean | Whether the thread is daemon or not. |  | Recommended |
+| [`thread.daemon`](../general/attributes.md) | boolean | Whether the thread is daemon or not. |  | Recommended |
 <!-- endsemconv -->
 
 ### Metric: `jvm.classes.loaded`
@@ -325,12 +325,12 @@ This metric is obtained from [`MemoryPoolMXBean#getUsage()`](https://docs.oracle
 <!-- semconv metric.jvm.memory.init(full) -->
 | Attribute  | Type | Description  | Examples  | Requirement Level |
 |---|---|---|---|---|
-| `type` | string | The type of memory. | `heap`; `non_heap` | Recommended |
-| `pool` | string | Name of the memory pool. [1] | `G1 Old Gen`; `G1 Eden space`; `G1 Survivor Space` | Recommended |
+| `jvm.memory.type` | string | The type of memory. | `heap`; `non_heap` | Recommended |
+| `jvm.memory.pool.name` | string | Name of the memory pool. [1] | `G1 Old Gen`; `G1 Eden space`; `G1 Survivor Space` | Recommended |
 
 **[1]:** Pool names are generally obtained via [MemoryPoolMXBean#getName()](https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/MemoryPoolMXBean.html#getName()).
 
-`type` MUST be one of the following:
+`jvm.memory.type` MUST be one of the following:
 
 | Value  | Description |
 |---|---|
@@ -385,7 +385,7 @@ This metric is obtained from [`BufferPoolMXBean#getMemoryUsed()`](https://docs.o
 <!-- semconv metric.jvm.buffer.usage(full) -->
 | Attribute  | Type | Description  | Examples  | Requirement Level |
 |---|---|---|---|---|
-| `pool` | string | Name of the buffer pool. [1] | `mapped`; `direct` | Recommended |
+| `jvm.buffer.pool.name` | string | Name of the buffer pool. [1] | `mapped`; `direct` | Recommended |
 
 **[1]:** Pool names are generally obtained via [BufferPoolMXBean#getName()](https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/BufferPoolMXBean.html#getName()).
 <!-- endsemconv -->
@@ -404,7 +404,7 @@ This metric is obtained from [`BufferPoolMXBean#getTotalCapacity()`](https://doc
 <!-- semconv metric.jvm.buffer.limit(full) -->
 | Attribute  | Type | Description  | Examples  | Requirement Level |
 |---|---|---|---|---|
-| `pool` | string | Name of the buffer pool. [1] | `mapped`; `direct` | Recommended |
+| `jvm.buffer.pool.name` | string | Name of the buffer pool. [1] | `mapped`; `direct` | Recommended |
 
 **[1]:** Pool names are generally obtained via [BufferPoolMXBean#getName()](https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/BufferPoolMXBean.html#getName()).
 <!-- endsemconv -->
@@ -423,7 +423,7 @@ This metric is obtained from [`BufferPoolMXBean#getCount()`](https://docs.oracle
 <!-- semconv metric.jvm.buffer.count(full) -->
 | Attribute  | Type | Description  | Examples  | Requirement Level |
 |---|---|---|---|---|
-| `pool` | string | Name of the buffer pool. [1] | `mapped`; `direct` | Recommended |
+| `jvm.buffer.pool.name` | string | Name of the buffer pool. [1] | `mapped`; `direct` | Recommended |
 
 **[1]:** Pool names are generally obtained via [BufferPoolMXBean#getName()](https://docs.oracle.com/en/java/javase/11/docs/api/java.management/java/lang/management/BufferPoolMXBean.html#getName()).
 <!-- endsemconv -->

model/metrics/process-runtime-jvm-metrics-experimental.yaml

@@ -34,8 +34,11 @@ groups:
   - id: attributes.jvm.buffer
     type: attribute_group
     brief: "Describes JVM buffer metric attributes."
+    prefix: jvm.buffer
     attributes:
-      - ref: pool
+      - id: pool.name
+        type: string
+        requirement_level: recommended
         brief: Name of the buffer pool.
         examples: [ "mapped", "direct" ]
         note: >

model/metrics/process-runtime-jvm-metrics.yaml

@@ -2,6 +2,7 @@ groups:
   - id: attributes.jvm.memory
     type: attribute_group
     brief: "Describes JVM memory metric attributes."
+    prefix: jvm.memory
     attributes:
       - id: type
         type:
@@ -16,7 +17,7 @@ groups:
         requirement_level: recommended
         brief: The type of memory.
         examples: ["heap", "non_heap"]
-      - id: pool
+      - id: pool.name
         type: string
         requirement_level: recommended
         brief: Name of the memory pool.
@@ -63,8 +64,9 @@ groups:
     brief: "Duration of JVM garbage collection actions."
     instrument: histogram
     unit: "s"
+    prefix: jvm.gc
     attributes:
-      - id: gc
+      - id: name
         type: string
         requirement_level: recommended
         brief: Name of the garbage collector.
@@ -88,9 +90,7 @@ groups:
     instrument: updowncounter
     unit: "{thread}"
     attributes:
-      - id: daemon
-        brief: "Whether the thread is daemon or not."
-        type: boolean
+      - ref: thread.daemon
         requirement_level: recommended
 
   - id: metric.jvm.classes.loaded

model/trace/general.yaml

@@ -215,6 +215,9 @@ groups:
         brief: >
           Current thread name.
         examples: main
+      - id: daemon
+        brief: "Whether the thread is daemon or not."
+        type: boolean
   - id: code
     prefix: code
     type: span

schema-next.yaml

@@ -27,6 +27,35 @@ versions:
             process.runtime.jvm.buffer.usage: jvm.buffer.usage
             process.runtime.jvm.buffer.limit: jvm.buffer.limit
             process.runtime.jvm.buffer.count: jvm.buffer.count
+        # https://github.com/open-telemetry/semantic-conventions/pull/20
+        - rename_attributes:
+            attribute_map:
+              type: jvm.memory.type
+              pool: jvm.memory.pool.name
+            apply_to_metrics:
+              - jvm.memory.usage
+              - jvm.memory.committed
+              - jvm.memory.limit
+              - jvm.memory.usage_after_last_gc
+              - jvm.memory.init
+        - rename_attributes:
+            attribute_map:
+              name: jvm.gc.name
+              action: jvm.gc.action
+            apply_to_metrics:
+              - jvm.gc.duration
+        - rename_attributes:
+            attribute_map:
+              daemon: thread.daemon
+            apply_to_metrics:
+              - jvm.threads.count
+        - rename_attributes:
+            attribute_map:
+              pool: jvm.buffer.pool.name
+            apply_to_metrics:
+              - jvm.buffer.usage
+              - jvm.buffer.limit
+              - jvm.buffer.count
   1.21.0:
     spans:
       changes: