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Improve set deletions percentage javadoc #12828

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merged 5 commits into from
Jan 22, 2025
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Improve set deletions percentage javadoc #12828

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3748dd9
Improve set deletions pct javadoc
Nov 20, 2023
948237b
Improve set deletions pct javadoc
Nov 20, 2023
5edc9d0
Improve set deletions percentage javadoc
yugushihuang Nov 24, 2023
6471613
Merge branch 'apache:main' into index_deletion_ratio_explanation
yugushihuang Jan 10, 2025
6ecd295
Merge branch 'apache:main' into index_deletion_ratio_explanation
yugushihuang Jan 18, 2025
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7 changes: 4 additions & 3 deletions lucene/core/src/java/org/apache/lucene/index/TieredMergePolicy.java
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Expand Up @@ -157,9 +157,10 @@ public double getMaxMergedSegmentMB() {
}

/**
* Controls the maximum percentage of deleted documents that is tolerated in the index. Lower
* values make the index more space efficient at the expense of increased CPU and I/O activity.
* Values must be between 5 and 50. Default value is 20.
* Sets the maximum percentage of doc id space taken by deleted docs. The denominator includes
* both active and deleted documents. Lower values make the index more space efficient at the
* expense of increased CPU and I/O activity. Values must be between 5 and 50. Default value is
* 20.
*
* <p>When the maximum delete percentage is lowered, the indexing thread will call for merges more
* often, meaning that write amplification factor will be increased. Write amplification factor
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