Add native histogram max sample size limit validation #6834
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PaurushGarg
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harry671003
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Jun 20, 2025
pkg/util/validation/limits.go
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| MaxLabelValueLength int `yaml:"max_label_value_length" json:"max_label_value_length"` | ||
| MaxLabelNamesPerSeries int `yaml:"max_label_names_per_series" json:"max_label_names_per_series"` | ||
| MaxLabelsSizeBytes int `yaml:"max_labels_size_bytes" json:"max_labels_size_bytes"` | ||
| MaxNativeHistogramsSampleSizeBytes int `yaml:"max_native_histograms_sample_size_bytes" json:"max_native_histograms_sample_size_bytes"` |
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nit: MaxNativeHistogramSampleSizeBytes
This is for a single sample. Not like the labels limit which is for all the labels.
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Thanks. Updated.
yeya24
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Jun 21, 2025
pkg/util/validation/errors.go
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| } | ||
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| // nativeHistogramSchemaInvalidError is a ValidationError implementation for samples with native histogram | ||
| // exceeding the valid schema range. |
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Need to update the comment. Not nativeHistogramSchemaInvalidError
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Thanks. Updated.
pkg/util/validation/validate.go
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| func ValidateNativeHistogram(validateMetrics *ValidateMetrics, limits *Limits, userID string, ls []cortexpb.LabelAdapter, histogramSample cortexpb.Histogram) (cortexpb.Histogram, error) { | ||
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| // sample size validation for native histogram | ||
| nhSampleSize := histogramSample.Size() |
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Nit: we can only calculate the sample size if the limit is > 0.
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Thanks. Updated.
PaurushGarg
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Signed-off-by: Paurush Garg <paurushg@amazon.com>
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Signed-off-by: Paurush Garg <paurushg@amazon.com>
yeya24
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Jun 24, 2025
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Jun 30, 2025
…6834) * Add sample size limit validation for native histograms samples Signed-off-by: Paurush Garg <paurushg@amazon.com> * Fixing Rebase Signed-off-by: Paurush Garg <paurushg@amazon.com> --------- Signed-off-by: Paurush Garg <paurushg@amazon.com>
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What this PR does:
Add native histogram max sample size bytes limit validation.
This is added b/c native histogram can have infinite buckets for a given schema increasing the size of a nh sample. Size of a NH sample can also grow due to other factors like Spans. Although max_bucket_count limit reduces resolution of NH samples, but this limit is added to discard samples if the sample size is excessive and can load Distributors.
This limit is not added as per-user override.
Which issue(s) this PR fixes:
Fixes #
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX]