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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17765) Reviving the merge possibility in the CompactingMemStore
Date Tue, 14 Mar 2017 04:46:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15923571#comment-15923571
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ramkrishna.s.vasudevan commented on HBASE-17765:
------------------------------------------------

Ok thanks [~anastas].
I did some experiments by changing these hard coded values and found siginificant changes
in GC pause time. But not on the overall PE results. I need to check my reports. 

> Reviving the merge possibility in the CompactingMemStore
> --------------------------------------------------------
>
>                 Key: HBASE-17765
>                 URL: https://issues.apache.org/jira/browse/HBASE-17765
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Anastasia Braginsky
>            Assignee: Anastasia Braginsky
>             Fix For: 2.0.0
>
>         Attachments: HBASE-17765-V01.patch
>
>
> According to the new performance results presented in the HBASE-16417 we see that the
read latency of the 90th percentile of the BASIC policy is too big due to the need to traverse
through too many segments in the pipeline. In this JIRA we correct the bug in the merge sizing
calculations and allow pipeline size threshold to be a configurable parameter.



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