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https://issues.apache.org/jira/browse/HBASE-16156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15357563#comment-15357563
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stack commented on HBASE-16156:
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You have thread dump w/ the contention showing? [~anastas] or [~eshcar], what
ye reckon?
> In write heavy scenario creating in memory flushes leads to contention
> ----------------------------------------------------------------------
>
> Key: HBASE-16156
> URL: https://issues.apache.org/jira/browse/HBASE-16156
> Project: HBase
> Issue Type: Sub-task
> Affects Versions: 2.0.0
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 2.0.0
>
>
> In write heavy cases, the inmemory flushes blocks the write because it takes
> a update lock. Dumps show that it is causing heavy contention and leads to
> memstore filling up and so intern blocks the flush from happening sooner.
> This JIRA is to discuss optimal settings and then make suitable changes.
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