Michael McCandless created LUCENE-10078:
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Summary: Enable merge-on-refresh by default?
Key: LUCENE-10078
URL: https://issues.apache.org/jira/browse/LUCENE-10078
Project: Lucene - Core
Issue Type: Improvement
Reporter: Michael McCandless
This is a spinoff from the discussion in LUCENE-10073.
The newish merge-on-refresh ([crazy origin
story|https://blog.mikemccandless.com/2021/03/open-source-collaboration-or-how-we.html])
feature is a powerful way to reduce searched segment counts, especially
helpful for applications using many indexing threads. Such usage will write
many tiny segments on each refresh, which could quickly be merged up during the
{{refresh}} operation.
We would have to implement a default for {{findFullFlushMerges}} (LUCENE-10064
is open for this), and then we would need
{{IndexWriterConfig.getMaxFullFlushMergeWaitMillis}} a non-zero value (this
issue).
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