[GitHub] spark issue #18073: [SPARK-20848][SQL] Shutdown the pool after reading parqu...

[viirya]

Github user viirya commented on the issue:

    https://github.com/apache/spark/pull/18073
  
    @cloud-fan My dev environment is not convenient to run GUI-based tools like 
jconsole. I use a command-line tool 
[jvmtop](https://github.com/patric-r/jvmtop).
    
    Screen shots (the column "#T" is the number of threads):
    
    Before:
    <img width="914" alt="screen shot 2017-05-24 at 9 43 11 pm" 
src="https://cloud.githubusercontent.com/assets/68855/26407021/7d5cdf82-40cc-11e7-880e-80675e181ab0.png";>
    
    After:
    <img width="918" alt="screen shot 2017-05-24 at 9 38 15 pm" 
src="https://cloud.githubusercontent.com/assets/68855/26406991/6c730282-40cc-11e7-9349-525b3624e5f9.png";>
    
    



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