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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19282) CellChunkMap Benchmarking and User Interface
Date Mon, 11 Dec 2017 14:18:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16285965#comment-16285965
] 

Anoop Sam John commented on HBASE-19282:
----------------------------------------

Off heap test having global off heap memstore threshold as ? (40% of 16 GB?)   In off heap
tests are u reducing the xmx accordingly?
So in mem flush at 10% of memstore flush size gives better result than 2% right?  So why he
had gone with 2% as def?  Or this is only with CCM and with CAM (which is the def as of now)
gives best result with 2%.   My pending task is test for this diff flush sizes.  Will do this
ASAP . :-)

> CellChunkMap Benchmarking and User Interface
> --------------------------------------------
>
>                 Key: HBASE-19282
>                 URL: https://issues.apache.org/jira/browse/HBASE-19282
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Anastasia Braginsky
>         Attachments: CCM Benchmarking.pdf
>
>
> We have made some experiments how working with CellChunkMap (CCM) influences the performance
when running on-heap and off-heap. Based on those results it is suggested to tie the MSLAB
usage (off-heap or on-heap) with CCM index usage.



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