Adrien Grand created LUCENE-10573:
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Summary: Improve stored fields bulk merge for degenerate O(n^2)
merges
Key: LUCENE-10573
URL: https://issues.apache.org/jira/browse/LUCENE-10573
Project: Lucene - Core
Issue Type: Improvement
Reporter: Adrien Grand
Spin-off from LUCENE-10556.
For small merges that are below the floor segment size, TieredMergePolicy may
merge segments that have vastly different sizes, e.g. one 10k-docs segment with
9 100-docs segments.
While we might be able to improve TieredMergePolicy (LUCENE-10569), there are
also improvements we could make to stored fields, such as bulk-copying chunks
of the first segment until the first dirty chunk. In this scenario where
segments keep being rewritten, this would help significantly.
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