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From "Liu Shaohui (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10788) Add 99th percentile of latency in PE
Date Thu, 27 Mar 2014 04:59:14 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13948892#comment-13948892
] 

Liu Shaohui commented on HBASE-10788:
-------------------------------------

[~ndimiduk]
{quote}
The thread name is not relevant in MR mode, and is redundant in your example output above.
{code}
+      String metricName =
+          testName + "-Client-" + Thread.currentThread().getName() + "-testRowTime";
{code}
{quote}
Adding thread name in the metric name is to distinguish metrics from  different threads in
no mapred mode. The the thread names in the log are added by the setStatus automatically and
i will remove one.
Thanks for your review and I will update the patch later.


> Add 99th percentile of latency in PE
> ------------------------------------
>
>                 Key: HBASE-10788
>                 URL: https://issues.apache.org/jira/browse/HBASE-10788
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.99.0
>            Reporter: Liu Shaohui
>            Assignee: Liu Shaohui
>            Priority: Minor
>         Attachments: HBASE-10788-trunk-v1.diff, HBASE-10788-trunk-v2.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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