16 lines
755 B
Plaintext
16 lines
755 B
Plaintext
[[breaking_50_aggregations_changes]]
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=== Aggregation changes
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==== Significant terms on numeric fields
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Numeric fields have been refactored to use a different data structure that
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performs better for range queries. However, since this data structure does
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not record document frequencies, numeric fields need to fall back to running
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queries in order to estimate the number of matching documents in the
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background set, which may incur a performance degradation.
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It is recommended to use <<keyword,`keyword`>> fields instead, either directly
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or through a <<multi-fields,multi-field>> if the numeric representation is
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still needed for sorting, range queries or numeric aggregations like
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<<search-aggregations-metrics-stats-aggregation,`stats` aggregations>>.
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