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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 Sat, 03 Sep 2016 18:04:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15461464#comment-15461464
] 

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

{quote}
What kind of test was it
{quote}
I load 1B small rows (rowkey=16 byte, value = 8 bytes) using BufferedMutator with batch size
1000. Table has 1 CF, only one region, splits are disabled. Compaction is on, but maximum
selection size is limited to 1GB. Test runs locally on my laptop (MBP, fast SSD).

> 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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