[jira] [Created] (DRILL-5918) Allow manual configuration when using Runtime.getRuntime().availableProcessors()

["Elijah Zupancic (JIRA)" <ji...@apache.org>]

Elijah Zupancic created DRILL-5918:
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             Summary: Allow manual configuration when using Runtime.getRuntime().availableProcessors()
                 Key: DRILL-5918
                 URL: https://issues.apache.org/jira/browse/DRILL-5918
             Project: Apache Drill
          Issue Type: Improvement
    Affects Versions: 1.11.0
            Reporter: Elijah Zupancic
            Priority: Critical


Currently Drill auto-configures the number of threads in various thread pools based on the processor count:

https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/server/BootStrapContext.java#L110
https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/server/options/TypeValidators.java#L269
https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/work/foreman/rm/AbstractResourceManager.java#L55
https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/work/foreman/rm/DefaultResourceManager.java#L99

In a number of situations, this configuration is incorrect. In particular, the settings aren't correct when [running in a bare-metal container](https://docs.google.com/document/d/1WGPGiJtbJZPZBMSD9YHAAz-O4AlAET9qOnS_GeriZtE/edit?usp=sharing) because you don't necessarily have access to all of the compute shares or memory of the underlying host.

Ideally, the number of CPUs to use could be specified as a system parameter to Drill. This would allow users to configure Drill to their optimal settings.



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