## Polars

| Variable          | Description                                                                                     |
| ----------------- | ----------------------------------------------------------------------------------------------- |
| `POLARS_TEMP_DIR` | Override the default temporary directory Polars uses for scratch files and some I/O operations. |

You may also set any Polars OSS-recognized environment variables.

## Polars on-premises

| Variable                   | Description                                                                                                                                                                                                     |
| -------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `OTLP_ENDPOINT`            | Target endpoint for sending OTLP traces/metrics/logs to your OpenTelemetry collector/observability stack.<br>e.g. `http://otel-collector:4317`.                                                                 |
| `OTEL_SERVICE_INSTANCE_ID` | OpenTelemetry `service.instance.id` that uniquely identifies this node in telemetry.<br>Must match `instance_id`.                                                                                               |
| `PLC_LOG_LEVEL`            | Controls logging verbosity for the Polars on-premises components (e.g. scheduler/worker).<br>e.g. `Info`, `Debug`, `Trace`, _etc._ (follows the Rust [naming](https://docs.rs/log/latest/log/enum.Level.html)). |


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Variable	Description
`OTLP_ENDPOINT`	Target endpoint for sending OTLP traces/metrics/logs to your OpenTelemetry collector/observability stack. e.g. `http://otel-collector:4317`.
`OTEL_SERVICE_INSTANCE_ID`	OpenTelemetry `service.instance.id` that uniquely identifies this node in telemetry. Must match `instance_id`.
`PLC_LOG_LEVEL`	Controls logging verbosity for the Polars on-premises components (e.g. scheduler/worker). e.g. `Info`, `Debug`, `Trace`, etc. (follows the Rust naming).

Polars

Polars on-premises

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