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From "Liu Shaohui (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-10788) Add 99th percentile of latency in PE
Date Thu, 20 Mar 2014 06:10:43 GMT

     [ https://issues.apache.org/jira/browse/HBASE-10788?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Liu Shaohui updated HBASE-10788:
--------------------------------

    Attachment: HBASE-10788-trunk-v2.diff

Add an report of min, avg, 95th, 99th, and 99.9th, max atency for each test.

Sample output
{code}
2014-03-20 13:59:27,924 INFO  [TestClient-2] hbase.PerformanceEvaluation: client-TestClient-2
RandomWriteTest latency log (ms), on 10240 measures
2014-03-20 13:59:27,924 INFO  [TestClient-2] hbase.PerformanceEvaluation: client-TestClient-2
RandomWriteTest Min    = 0.0
2014-03-20 13:59:27,924 INFO  [TestClient-2] hbase.PerformanceEvaluation: client-TestClient-2
RandomWriteTest Avg    = 0.11376953125
2014-03-20 13:59:27,924 INFO  [TestClient-2] hbase.PerformanceEvaluation: client-TestClient-2
RandomWriteTest StdDev = 4.195329193206241
2014-03-20 13:59:27,924 INFO  [TestClient-2] hbase.PerformanceEvaluation: client-TestClient-2
RandomWriteTest 50th   = 0.0
2014-03-20 13:59:27,925 INFO  [TestClient-2] hbase.PerformanceEvaluation: client-TestClient-2
RandomWriteTest 95th   = 0.0
2014-03-20 13:59:27,925 INFO  [TestClient-2] hbase.PerformanceEvaluation: client-TestClient-2
RandomWriteTest 99th   = 0.7100000000000364
2014-03-20 13:59:27,925 INFO  [TestClient-2] hbase.PerformanceEvaluation: client-TestClient-2
RandomWriteTest 99.9th = 45.78200000000015
2014-03-20 13:59:27,925 INFO  [TestClient-2] hbase.PerformanceEvaluation: client-TestClient-2
RandomWriteTest Max    = 289.0
{code}
[~ndimiduk][~lhofhansl] [~apurtell] 
Please help to review this patch. Thx


> 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, 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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