Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Track JVM gc time in histogram #2903

Merged
merged 13 commits into from
Nov 15, 2022
Merged

Track JVM gc time in histogram #2903

Show file tree
Hide file tree
Changes from 5 commits
Commits
Show all changes
13 commits
Select commit Hold shift + click to select a range
240955a
Track JVM gc time in histogram
jack-berg Oct 24, 2022
940d89c
Fix markdownlint
jack-berg Oct 24, 2022
034b1f2
line breaks between footnotes
jack-berg Oct 24, 2022
18a5316
Update specification/metrics/semantic_conventions/runtime-environment…
jack-berg Oct 31, 2022
6706978
Add changelog entry
jack-berg Oct 31, 2022
e61b296
Merge branch 'main' of https://github.com/open-telemetry/opentelemetr…
jack-berg Nov 7, 2022
4b11c14
Merge branch 'main' of https://github.com/open-telemetry/opentelemetr…
jack-berg Nov 8, 2022
0eaa2e8
Ms -> ms
jack-berg Nov 8, 2022
8f2eca9
Merge branch 'main' of https://github.com/open-telemetry/opentelemetr…
jack-berg Nov 9, 2022
424eaba
Change metric name to process.runtime.jvm.gc.duration
jack-berg Nov 9, 2022
51be963
Merge branch 'main' into jvm-gc-time
jack-berg Nov 11, 2022
35ab5c8
Merge branch 'main' into jvm-gc-time
jack-berg Nov 14, 2022
74ae2e6
Merge branch 'main' into jvm-gc-time
jack-berg Nov 15, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 2 additions & 0 deletions CHANGELOG.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@ release.

- Handle duplicate description comments during Prometheus conversion.
([#2890](https://github.com/open-telemetry/opentelemetry-specification/pull/2890))
- Add `process.runtime.jvm.gc.time` metric to semantic conventions.
([#2903](https://github.com/open-telemetry/opentelemetry-specification/pull/2903))

### Logs

Expand Down
56 changes: 36 additions & 20 deletions specification/metrics/semantic_conventions/runtime-environment-metrics.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -61,28 +61,44 @@ consider, for example pthreads vs green thread implementations.

All JVM metric attributes are required unless otherwise indicated.

| Name | Description | Unit | Unit ([UCUM](README.md#instrument-units)) | Instrument Type ([*](README.md#instrument-types)) | Value Type | Attribute Key | Attribute Values |
|--------------------------------------------|----------------------------------------------------------|---------|-------------------------------------------|---------------------------------------------------|------------|---------------|-----------------------|
| process.runtime.jvm.memory.usage | Measure of memory used | Bytes | `By` | UpDownCounter | Int64 | type | `"heap"`, `"nonheap"` |
| | | | | | | pool | Name of pool [1] |
| process.runtime.jvm.memory.init | Measure of initial memory requested | Bytes | `By` | UpDownCounter | Int64 | type | `"heap"`, `"nonheap"` |
| | | | | | | pool | Name of pool [1] |
| process.runtime.jvm.memory.committed | Measure of memory committed | Bytes | `By` | UpDownCounter | Int64 | type | `"heap"`, `"nonheap"` |
| | | | | | | pool | Name of pool [1] |
| process.runtime.jvm.memory.limit | Measure of max obtainable memory | Bytes | `By` | UpDownCounter | Int64 | type | `"heap"`, `"nonheap"` |
| | | | | | | pool | Name of pool [1] |
| process.runtime.jvm.threads.count | Number of executing threads | threads | `{threads}` | UpDownCounter | Int64 | daemon | `true`, `false` |
| process.runtime.jvm.classes.loaded | Number of classes loaded since JVM start | classes | `{classes}` | Counter | Int64 | | |
| process.runtime.jvm.classes.unloaded | Number of classes unloaded since JVM start | classes | `{classes}` | Counter | Int64 | | |
| process.runtime.jvm.classes.current_loaded | Number of classes currently loaded | classes | `{classes}` | UpDownCounter | Int64 | | |
| process.runtime.jvm.cpu.utilization | Recent cpu utilization for the process [2] | 1 | 1 | Asynchronous Gauge | Double | | |
| process.runtime.jvm.system.cpu.utilization | Recent cpu utilization for the whole system [2] | 1 | 1 | Asynchronous Gauge | Double | | |
| process.runtime.jvm.system.cpu.load_1m | Average CPU load of the whole system for the last minute | 1 | 1 | Asynchronous Gauge | Double | | |
| process.runtime.jvm.buffer.usage | Measure of memory used by buffers | Bytes | `By` | UpDownCounter | Int64 | pool | Name of pool[3] |
| process.runtime.jvm.buffer.limit | Measure of total memory capacity of buffers | Bytes | `By` | UpDownCounter | Int64 | pool | Name of pool[3] |
| process.runtime.jvm.buffer.count | Number of buffers in the pool | buffers | `{buffers}` | UpDownCounter | Int64 | pool | Name of pool[3] |
| Name | Description | Unit | Unit ([UCUM](README.md#instrument-units)) | Instrument Type ([*](README.md#instrument-types)) | Value Type | Attribute Key | Attribute Values |
|--------------------------------------------|----------------------------------------------------------|--------------|-------------------------------------------|---------------------------------------------------|------------|---------------|-----------------------|
| process.runtime.jvm.memory.usage | Measure of memory used | Bytes | `By` | UpDownCounter | Int64 | type | `"heap"`, `"nonheap"` |
| | | | | | | pool | Name of pool [1] |
| process.runtime.jvm.memory.init | Measure of initial memory requested | Bytes | `By` | UpDownCounter | Int64 | type | `"heap"`, `"nonheap"` |
| | | | | | | pool | Name of pool [1] |
| process.runtime.jvm.memory.committed | Measure of memory committed | Bytes | `By` | UpDownCounter | Int64 | type | `"heap"`, `"nonheap"` |
| | | | | | | pool | Name of pool [1] |
| process.runtime.jvm.memory.limit | Measure of max obtainable memory | Bytes | `By` | UpDownCounter | Int64 | type | `"heap"`, `"nonheap"` |
| | | | | | | pool | Name of pool [1] |
| process.runtime.jvm.threads.count | Number of executing threads | threads | `{threads}` | UpDownCounter | Int64 | daemon | `true`, `false` |
| process.runtime.jvm.classes.loaded | Number of classes loaded since JVM start | classes | `{classes}` | Counter | Int64 | | |
| process.runtime.jvm.classes.unloaded | Number of classes unloaded since JVM start | classes | `{classes}` | Counter | Int64 | | |
| process.runtime.jvm.classes.current_loaded | Number of classes currently loaded | classes | `{classes}` | UpDownCounter | Int64 | | |
| process.runtime.jvm.cpu.utilization | Recent cpu utilization for the process [2] | 1 | 1 | Asynchronous Gauge | Double | | |
| process.runtime.jvm.system.cpu.utilization | Recent cpu utilization for the whole system [2] | 1 | 1 | Asynchronous Gauge | Double | | |
| process.runtime.jvm.system.cpu.load_1m | Average CPU load of the whole system for the last minute | 1 | 1 | Asynchronous Gauge | Double | | |
| process.runtime.jvm.buffer.usage | Measure of memory used by buffers | Bytes | `By` | UpDownCounter | Int64 | pool | Name of pool[3] |
| process.runtime.jvm.buffer.limit | Measure of total memory capacity of buffers | Bytes | `By` | UpDownCounter | Int64 | pool | Name of pool[3] |
| process.runtime.jvm.buffer.count | Number of buffers in the pool | buffers | `{buffers}` | UpDownCounter | Int64 | pool | Name of pool[3] |
| process.runtime.jvm.gc.time | Time spent performing JVM garbage collection actions | Milliseconds | `Ms` | Histogram | Int64 | gc | Name of gc[4] |
jack-berg marked this conversation as resolved.
Show resolved Hide resolved
| | | | | | | action | The gc action[4] |

**[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()).
Examples include `G1 Old Gen`, `G1 Eden space`, `G1 Survivor Space`, `Metaspace`, etc.

**[2]**: These utilizations are not defined as being for the specific interval since last measurement (unlike `system.cpu.utilization`).

**[3]**: 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()).

**[4]**: Garbage collector name and action are generally obtained via [GarbageCollectionNotificationInfo#getGcName()](https://docs.oracle.com/en/java/javase/11/docs/api/jdk.management/com/sun/management/GarbageCollectionNotificationInfo.html#getGcName()) and [GarbageCollectionNotificationInfo#getGcAction()](https://docs.oracle.com/en/java/javase/11/docs/api/jdk.management/com/sun/management/GarbageCollectionNotificationInfo.html#getGcAction()) respectively. The following is an incomplete list of names and actions for several popular garbage collectors:

* G1 Garbage Collector
* Names: `G1 Young Generation`, `G1 Old Generation`
* Actions: `end of minor GC`, `end of major GC`
* Shenandoah Garbage Collector
* Names: `Shenandoah Cycles`, `Shenandoah Pauses`
* Actions: `end of GC cycle`, `end of GC pause`
* Z Garbage Collector
* Names: `ZGC Cycles`, `ZGC Pauses`
* Actions: `end of GC cycle`, `end of GC pause`