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https://issues.apache.org/jira/browse/LUCENE-9165?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir resolved LUCENE-9165.
---------------------------------
    Fix Version/s: master (9.0)
       Resolution: Fixed

> change generate-defaults.gradle not to cap testsJvms at 4
> ---------------------------------------------------------
>
>                 Key: LUCENE-9165
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9165
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Robert Muir
>            Priority: Major
>             Fix For: master (9.0)
>
>         Attachments: LUCENE-9165.patch
>
>
> {code}
>       def cpus = Runtime.runtime.availableProcessors()
>       def testsJvms = (int) Math.max(1d, Math.min(cpus * 0.5d, 4))
> {code}
> Dividing by 2 is still good (hyperthreading is still a thing), but the 
> artificial cap of 4 is a bottleneck if the hardware has more available.



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