fix: skip per-label limiter and sanitizer for info metrics#6660
Merged
electron0zero merged 4 commits intografana:mainfrom Mar 12, 2026
Merged
fix: skip per-label limiter and sanitizer for info metrics#6660electron0zero merged 4 commits intografana:mainfrom
electron0zero merged 4 commits intografana:mainfrom
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…fo metrics The PerLabelLimiter was tracking cardinality for ALL labels that passed through it, including resource attributes from target_info and host_info. This caused the demand estimate metric to report way more label names instead of just the configured dimensions from span-metrics and service-graphs. info metrics carry all resource attributes as labels and have high cardinality by design so we should not limit and sanitize info metrics. Made chanegs to skip the span name drain sanitizer for these metrics as well.
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oleg-kozlyuk-grafana
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Mar 12, 2026
Add TestManagedRegistry_InfoMetricLabelsNotInDemandEstimate that pushes data through both NewLabelBuilder (span-metrics) and NewInfoMetricLabelBuilder (target_info, host_info), then asserts only span-metrics labels appear in the tempo_metrics_generator_registry_label_cardinality_demand_estimate metric.
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What this PR does:
The PerLabelLimiter was tracking cardinality for ALL labels that passed through it, including resource attributes from target_info and host_info.
This caused the demand estimate metric to report way more label names instead of just the configured dimensions from span-metrics and service-graphs.
info metrics carry all resource attributes as labels and have high cardinality by design so we should not limit and sanitize info metrics.
Made changes to skip the span name drain sanitizer for info metrics as well.
Which issue(s) this PR fixes:
Fixes #
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX]