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@@ -4,3 +4,15 @@ area: SQL
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type: enhancement
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issues:
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- 88764
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+highlight:
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+ title: Speed up SQL queries by not tracking total hits by default
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+ body: |-
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+ SQL query translator now explicitly sets track_total_hits to false when
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+ not needed.
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+ This has a significant impact on SQL query performance in cases where total hits
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+ are not needed to calculate the final result, in particular when the cost of evaluation
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+ of a single document is particularly high (eg. queries that involve script evaluation)
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+ and in queries with a small LIMIT value.
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+ In our tests, on some specific queries, we see a speed-up of more than 50%,
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+ with peaks of ~95% (from 600ms to 20ms).
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+ notable: true
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Luigi Dell'Aquila