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[chore][exporter/datadog] Add a section about how to switch to Zorkian #28836

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[chore][exporter/datadog] Add a section about how to switch to Zorkia…
…n client
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songy23 committed Oct 31, 2023
commit 8f483e39971415a63780d31873369157dbbe1307
6 changes: 6 additions & 0 deletions exporter/datadogexporter/README.md
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Expand Up @@ -50,6 +50,12 @@ The exact values for `send_batch_size` and `send_batch_max_size` depends on your
- Log intake: https://docs.datadoghq.com/api/latest/logs/
- Metrics V2 intake: https://docs.datadoghq.com/api/latest/metrics/#submit-metrics

### Fall back to the Zorkian metric client with feature gate
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Since [v0.69.0](https://github.com/open-telemetry/opentelemetry-collector-contrib/releases/tag/v0.69.0), the Datadog exporter has switched to use the native metric client `datadog-api-client-go` for metric export instead of Zorkian client by default. While `datadog-api-client-go` fixed several issues that are present in Zorkian client, there is a performance regression with it compared to Zorkian client espeicially under high metric volume. If you observe memory or throughput issues in the Datadog exporter with `datadog-api-client-go`, you can configure the Datadog exporter to fall back to the Zorkian client by disabling the feature gate `exporter.datadogexporter.metricexportnativeclient`, e.g.
```
otelcol --config=config.yaml --feature-gates=-exporter.datadogexporter.metricexportnativeclient
```

[beta]:https://github.com/open-telemetry/opentelemetry-collector#beta
[alpha]:https://github.com/open-telemetry/opentelemetry-collector#alpha
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