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From sudheeshkatkam <...@git.apache.org>
Subject [GitHub] drill pull request: DRILL-4654: Add new metrics to the MetricRegis...
Date Thu, 05 May 2016 17:39:11 GMT
Github user sudheeshkatkam commented on the pull request:

    https://github.com/apache/drill/pull/495#issuecomment-217221522
  
    Good points. I added a comment in code, but it does not completely address your concerns.
    
    Unfortunately, not all class (e.g. RootAllocator) can be instrumented for metrics if the
single instance is part of a contextual object. Static instance is fine according to [library
doc](https://dropwizard.github.io/metrics/3.1.0/getting-started/#the-registry). This means
maintaining state in a static object. Is there a workaround?
    
    AFAIK we do not provide a way to run multiple drillbits in the same JVM in production
use cases. You are right, metrics will conflict for unit tests (as is, right now).


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