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From "John Leach (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-13420) RegionEnvironment.offerExecutionLatency Blocks Threads under Heavy Load
Date Tue, 07 Apr 2015 20:44:12 GMT
John Leach created HBASE-13420:
----------------------------------

             Summary: RegionEnvironment.offerExecutionLatency Blocks Threads under Heavy Load
                 Key: HBASE-13420
                 URL: https://issues.apache.org/jira/browse/HBASE-13420
             Project: HBase
          Issue Type: Improvement
            Reporter: John Leach


The ArrayBlockingQueue blocks threads for 20s during a performance run focusing on creating
numerous small scans.  

I see a buffer size of (100)

    private final BlockingQueue<Long> coprocessorTimeNanos = new ArrayBlockingQueue<Long>(
        LATENCY_BUFFER_SIZE);

and then I see a drain coming from
         MetricsRegionWrapperImpl with 45 second executor
         HRegionMetricsWrapperRunable
         RegionCoprocessorHost#getCoprocessorExecutionStatistics()   
         RegionCoprocessorHost#getExecutionLatenciesNanos()

Am I missing something?





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