> ## Documentation Index
> Fetch the complete documentation index at: https://www.activepieces.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Observability

> Configure log export and sampling for observability

Activepieces exports structured logs via evlog. Each API request and worker job execution emits a single wide-event JSON object including duration, status, and sampling context.

## Log Export Variables

| Variable                      | Description                                                 | Default Value | Example                       |
| ----------------------------- | ----------------------------------------------------------- | ------------- | ----------------------------- |
| `AP_OTEL_ENABLED`             | Export logs via OTLP log drain (no traces or metrics)       | `false`       | `true`                        |
| `OTEL_EXPORTER_OTLP_ENDPOINT` | OTLP endpoint for log export                                | None          | `https://your-collector:4317` |
| `OTEL_EXPORTER_OTLP_HEADERS`  | Headers for OTLP exporter (comma-separated key=value pairs) | None          | `Authorization=Bearer token`  |

## Sampling Variables

| Variable                  | Description                                          | Default Value |
| ------------------------- | ---------------------------------------------------- | ------------- |
| `AP_LOG_SAMPLE_RATE_INFO` | Percentage of info-level events to keep (0–100)      | `100`         |
| `AP_LOG_KEEP_SLOW_MS`     | Always keep requests slower than this threshold (ms) | `2000`        |

<Note>
  Events with level `warn` or `error` are always kept regardless of sampling configuration.
  `AP_OTEL_ENABLED=true` enables the OTLP **log** drain only — OpenTelemetry tracing and metrics are no longer emitted.
</Note>