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Grafana Mimir Configure Native histograms

Configure native histograms

Prometheus native histograms ingestion is an experimental feature of Grafana Mimir.

You can configure native histograms ingestion via the Prometheus remote write API endpoint globally or per tenant.

Configure native histograms globally

To enable ingesting Prometheus native histograms over the remote write API endpoint for all tenants, set the flag -ingester.native-histograms-ingestion-enabled=true on ingesters.

To limit the number of native histogram buckets per sample, set the -validation.max-native-histogram-buckets flag on distributors. The recommended value is 160 which is the default in the OpenTelemetry SDK for exponential histograms, which are a similar concept in OpenTelemetry. Samples with more buckets than the limit will be dropped.

Configure native histograms per tenant

To enable ingesting Prometheus native histograms over the remote write API for a tenant, set the native_histograms_ingestion_enabled runtime value to true.

To limit the number of native histogram buckets per sample for a tenant, set the max_native_histogram_buckets runtime value. The recommended value is 160 which is the default in the OpenTelemetry SDK for exponential histograms, which are a similar concept in OpenTelemetry. Samples with more buckets than the limit will be dropped.

yaml

overrides:
  tenant1:
    native_histograms_ingestion_enabled: true
    max_native_histogram_buckets: 160

Configure Prometheus to write native histograms to Grafana Mimir

To enable experimental support for scraping and ingesting native histograms in Prometheus, enable the feature with the flag --enable-feature=native-histograms.

To enable Prometheus remote write to send native histograms to Grafana Mimir, add the send_native_histograms: true parameter to your remote write configuration, for example:

yaml

remote_write:
  - url: <your-url>
    send_native_histograms: true