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Update TieredMergePolicy's default number of segments per tier #130328

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Update TieredMergePolicy's default number of segments per tier#130328
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:Distributed Indexing/EngineAnything around managing Lucene and the Translog in an open shard.>enhancementTeam:Distributed IndexingMeta label for Distributed Indexing team
@jpountz

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@jpountz
jpountz
opened on Jun 30, 2025

Description

Lucene 10.3 is going to decrease the number of segments per tier of TieredMergePolicy from 10 to 8. Elasticsearch should likely do the same in its MergePolicyConfig.

See apache/lucene#14823

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    :Distributed Indexing/EngineAnything around managing Lucene and the Translog in an open shard.>enhancementTeam:Distributed IndexingMeta label for Distributed Indexing team

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