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https://issues.apache.org/jira/browse/HBASE-13420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14529743#comment-14529743
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John Leach commented on HBASE-13420:
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Andrew,
Sorry for the delay, day job is killing me. Our workload hammers the metrics
collection since it is called on really low level items (startRegionOperation
and stopRegionOperation)... My vote is to remove this metric because it is
really hard to understand what it is measuring... Oops, I do not have a vote.
Regards,
John Leach
> 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
> Assignee: Andrew Purtell
> Fix For: 2.0.0, 0.98.13, 1.0.2, 1.2.0, 1.1.1
>
> Attachments: 1M-0.98.12.svg, 1M-0.98.13-SNAPSHOT.svg,
> HBASE-13420.patch, HBASE-13420.txt, hbase-13420.tar.gz,
> offerExecutionLatency.tiff
>
> Original Estimate: 3h
> Remaining Estimate: 3h
>
> 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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