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https://issues.apache.org/jira/browse/HBASE-11209?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nicolas Liochon resolved HBASE-11209.
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Resolution: Fixed
Hadoop Flags: Reviewed
Committed to master & 0.98, hopefully correctly with the new git based process.
Thanks for the review, Andrew!
> Increase the default value for hbase.hregion.memstore.block.multipler from 2
> to 4
> ---------------------------------------------------------------------------------
>
> Key: HBASE-11209
> URL: https://issues.apache.org/jira/browse/HBASE-11209
> Project: HBase
> Issue Type: Brainstorming
> Components: regionserver
> Affects Versions: 0.99.0, 0.98.2
> Reporter: Nicolas Liochon
> Assignee: Nicolas Liochon
> Fix For: 0.99.0, 0.98.3
>
> Attachments: HBASE-11209.patch
>
>
> On a YCSB test, I saw a 33% performance increase, both on the max latency and
> on the throughput. I'm convinced enough that this value is better that I
> think it makes sense to change it on 0.98 as well.
> More fundamentally, but outside of the scope of this patch, I think this
> parameter should be changed to something at the region server level: today,
> we have:
> - global memstore check: if we're other 40%, we flush the biggest memstore
> - local: no more than 2 (proposed: 4) memstore size per region.
> But if we have enough memory and a spike on a region, there is no reason for
> not taking the write.
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