Environment Variables

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.
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).