David Smiley created LUCENE-8965:
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Summary: ConcurrentMergeScheduler should maybe sometimes do
synchronously
Key: LUCENE-8965
URL: https://issues.apache.org/jira/browse/LUCENE-8965
Project: Lucene - Core
Issue Type: Improvement
Components: core/index
Reporter: David Smiley
Assignee: David Smiley
It can be beneficial for the ConcurrentMergeScheduler to sometimes _not_ do
concurrent merges (i.e. sometimes do a serial merge). When the provided
"OneMerge" is _small_ and when the MergeTrigger is FULL_FLUSH (i.e. on a
commit), a new searcher would benefit from seeing fewer segments. If index
replication is used, this setting can reduce the net replication by merging a
little more eagerly sometimes.
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