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From "Phil Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16652) Figure out performance difference between increment and append
Date Tue, 20 Sep 2016 09:18:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15506133#comment-15506133
] 

Phil Yang commented on HBASE-16652:
-----------------------------------

What are the sizes of two WAL.Entry?

> Figure out performance difference between increment and append
> --------------------------------------------------------------
>
>                 Key: HBASE-16652
>                 URL: https://issues.apache.org/jira/browse/HBASE-16652
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Heng Chen
>              Labels: performance
>         Attachments: 1.diff, HBASE-16652.patch, append.jfr, append_get_profile.png, increment.jfr,
increment_get_profile.png
>
>
> When do performance test in HBASE-16625,  i found it has the very big difference between
Append and Increment (append is about 37% faster than increment).
> As [~stack] mentioned in https://issues.apache.org/jira/browse/HBASE-16610?focusedCommentId=15493166&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15493166,
  append and increment has been unified in server-side,  and they looks the same in client-side.

> This issue is to figure out why the performance looks different between them.



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