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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14921) Memory optimizations
Date Mon, 20 Jun 2016 08:19:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15339144#comment-15339144
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Anoop Sam John commented on HBASE-14921:
----------------------------------------

Any chance for  a test on a high end system config? 1 GB heap for RS seems very minimal. 
How you arrived at only 30% being given as Memstore size where 40% is default? 
You wanted to make use of MSLAB chunk pool.  But in the listed configs am not able to see
"hbase.hregion.memstore.chunkpool.maxsize".  This defaults to 0 and so no pooling of MALAB
chunks !!
bq.<name>hbase.regionserver.global.memstore.lowerLimit</name> <value>1.0f</value>
You wanted this lower size to be 10% ie. 0.1?   1.0 is an invalid value for this config

> Memory optimizations
> --------------------
>
>                 Key: HBASE-14921
>                 URL: https://issues.apache.org/jira/browse/HBASE-14921
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 2.0.0
>            Reporter: Eshcar Hillel
>            Assignee: Anastasia Braginsky
>         Attachments: CellBlocksSegmentInMemStore.pdf, CellBlocksSegmentinthecontextofMemStore(1).pdf,
HBASE-14921-V01.patch, HBASE-14921-V02.patch, HBASE-14921-V03.patch, HBASE-14921-V04-CA.patch,
InitialCellArrayMapEvaluation.pdf, IntroductiontoNewFlatandCompactMemStore.pdf
>
>
> Memory optimizations including compressed format representation and offheap allocations



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