Kevin Risden created LUCENE-10576:
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Summary: ConcurrentMergeScheduler maxThreadCount calculation is
artificially low
Key: LUCENE-10576
URL: https://issues.apache.org/jira/browse/LUCENE-10576
Project: Lucene - Core
Issue Type: Bug
Reporter: Kevin Risden
https://github.com/apache/lucene/blob/main/lucene/core/src/java/org/apache/lucene/index/ConcurrentMergeScheduler.java#L177
{code:java}
maxThreadCount = Math.max(1, Math.min(4, coreCount / 2));
{code}
This has a practical limit of max of 4 threads due to the Math.min. This
doesn't take into account higher coreCount.
I can't seem to tell if this is by design or this is just a mix up of logic
during the calculation.
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