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From "Vladimir Rodionov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15513) hbase.hregion.memstore.chunkpool.maxsize is 0.0 by default
Date Wed, 31 Aug 2016 23:57:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15453779#comment-15453779
] 

Vladimir Rodionov commented on HBASE-15513:
-------------------------------------------

These are test results with G1GC:

https://issues.apache.org/jira/browse/HBASE-15180?focusedCommentId=15126122&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15126122

We have many confirmations, that chunk pool has a value and default size should be increased
from 0 to 1.0. 
[~saint.ack@gmail.com], [~ramkrishna.s.vasudevan@gmail.com], [~anoop.hbase] if you have any
doubts, questions, objections - its time to raise your hand :). 

> hbase.hregion.memstore.chunkpool.maxsize is 0.0 by default
> ----------------------------------------------------------
>
>                 Key: HBASE-15513
>                 URL: https://issues.apache.org/jira/browse/HBASE-15513
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 2.0.0
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>             Fix For: 2.0.0
>
>         Attachments: HBASE-15513-v1.patch
>
>
> That results in excessive MemStoreLAB chunk allocations because we can not reuse them.
Not sure, why it has been disabled, by default. May be the code has not been tested well?



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