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Add environment variables for Periodic exporting MetricReader #2038

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Oct 25, 2021
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Add environment variables for Periodic exporting MetricReader #2038

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3935919
add environment variables for Periodic exporting MetricReader
reyang Oct 19, 2021
ada0aea
adjust format
reyang Oct 19, 2021
40682cb
update changelog
reyang Oct 19, 2021
9d3e450
Merge branch 'main' into reyang/metrics-sdk-envvars
reyang Oct 20, 2021
936f781
Merge branch 'main' into reyang/metrics-sdk-envvars
reyang Oct 22, 2021
6cc0521
use user friendly name based on SIG discussion
reyang Oct 22, 2021
f96ada1
update wording
reyang Oct 24, 2021
00fd4fd
Merge branch 'main' into reyang/metrics-sdk-envvars
reyang Oct 24, 2021
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2 changes: 2 additions & 0 deletions CHANGELOG.md
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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))

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7 changes: 7 additions & 0 deletions specification/sdk-environment-variables.md
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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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