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https://issues.apache.org/jira/browse/HBASE-10788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13940794#comment-13940794
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Nick Dimiduk commented on HBASE-10788:
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Could be your use of a real metrics library is the right way to go. My version
allocates arrays of doubles, which can become expensive. I'd also like to add a
mixed-workload test, in which case it'll be good to isolate read from write
metrics, etc. Maybe your use of the yammer metrics library will support this,
and also help minimize memory footprint while maintaining statical significance
of the results. If you're adding a new dependency, be sure to include the jar
in the mapreduce job.
Good on you [~liushaohui].
> Add 99th percentile of latency in PE
> ------------------------------------
>
> Key: HBASE-10788
> URL: https://issues.apache.org/jira/browse/HBASE-10788
> Project: HBase
> Issue Type: Improvement
> Reporter: Liu Shaohui
> Assignee: Liu Shaohui
> Priority: Minor
> Attachments: HBASE-10788-trunk-v1.diff
>
>
> In production env, 99th percentile of latency is more important than the avg.
> The 99th percentile is helpful to measure the influence of GC, slow
> read/write of HDFS.
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