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https://issues.apache.org/jira/browse/RANGER-1729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16121441#comment-16121441
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Colm O hEigeartaigh commented on RANGER-1729:
---------------------------------------------

I wonder how much the slowdown could have been caused by policy retrieval - if 
you change the default value for policy retrieval from 30 seconds to say 10000 
seconds, what would be the slowdown?

> The hbase's performance will be significantly reduced after used Ranger to 
> control and configure Hbase data security
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: RANGER-1729
>                 URL: https://issues.apache.org/jira/browse/RANGER-1729
>             Project: Ranger
>          Issue Type: Bug
>          Components: Ranger
>            Reporter: Qiang Zhang
>            Assignee: Qiang Zhang
>              Labels: patch
>         Attachments: result_detail.png
>
>
> The hbase's performance will be significantly reduced after used Ranger to 
> control and configure Hbase data security. I used following environment to 
> verify issue.
> Test tools:ycsb-0.1.4
> Test environment:
> Node number:4节点
> Node configuration detail is as following:
> Node1、Node2:
> CPU:32 core,Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz
> memory:128GB
> Node3、Node4
> CPU:48 core,Intel(R) Xeon(R) CPU E5-2670 v3 @ 2.30GHz
> memory:128GB 
> The test result:
> 2. Add one policy and not write audit log, HBase's performance decreased 
> 10.10%;
> 3. Add one policy and write audit log, HBase's performance decreased 12.90%;
> Please refer to result_detail.png.
> This decline is unacceptable in a real environment. It will seriously affect 
> the user to use Ranger.



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