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Add environment variables for Periodic exporting MetricReader #2038

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2 changes: 2 additions & 0 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,8 @@ release.
([#1935](https://github.com/open-telemetry/opentelemetry-specification/pull/1935))
- Add clarifications on how to handle numerical limits.
([#2007](https://github.com/open-telemetry/opentelemetry-specification/pull/2007))
- Add environment variables for Periodic exporting MetricReader.
([#2038](https://github.com/open-telemetry/opentelemetry-specification/pull/2038))

### Logs

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7 changes: 7 additions & 0 deletions specification/sdk-environment-variables.md
Original file line number Diff line number Diff line change
Expand Up @@ -192,6 +192,13 @@ Known values for `OTEL_METRICS_EXEMPLAR_FILTER` are:
- `"all"`: All measurements are eligible for exemplar sampling.
- `"with_sampled_trace"`: Only allow measurements with a sampled parent span in context.

### Periodic exporting MetricReader

| Name | Description | Default | Notes |
| ----------------------------- | ----------------------------------------------------------------------------- | ------- | ----- |
| `OTEL_METRIC_EXPORT_INTERVAL` | The time interval (in milliseconds) between the start of two export attempts. | 60000 | |
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| `OTEL_METRIC_EXPORT_TIMEOUT` | Maximum allowed time (in milliseconds) to export data. | 30000 | |

## Language Specific Environment Variables

To ensure consistent naming across projects, this specification recommends that language specific environment variables are formed using the following convention:
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