[jira] [Created] (LUCENE-10576) ConcurrentMergeScheduler maxThreadCount calculation is artificially low

["Kevin Risden (Jira)" <ji...@apache.org>]

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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