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https://issues.apache.org/jira/browse/HBASE-20875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-20875:
--------------------------
Component/s: Performance
> MemStoreLABImp::copyIntoCell uses 7% CPU when writing
> -----------------------------------------------------
>
> Key: HBASE-20875
> URL: https://issues.apache.org/jira/browse/HBASE-20875
> Project: HBase
> Issue Type: Sub-task
> Components: Performance
> Affects Versions: 2.0.1
> Reporter: stack
> Assignee: stack
> Priority: Major
> Fix For: 2.0.2
>
> Attachments:
> 0001-HBASE-20875-MemStoreLABImp-copyIntoCell-uses-7-CPU-w.patch,
> 2.0707.baseline.91935.cpu.svg, 2.0711.patched.145414.cpu.svg, Screen Shot
> 2018-07-11 at 9.52.46 PM.png
>
>
> Looks like this with a PE random write loading:
> {code}
> ./hbase/bin/hbase --config ~/conf_hbase
> org.apache.hadoop.hbase.PerformanceEvaluation --nomapred --presplit=40
> --size=30 --columns=10 --valueSize=100 randomWrite 200
> {code}
> ... against a single server.
> {code}
> 12.47% perf-91935.map
> [.] Lorg/apache/hadoop/hbase/BBKVComparator;::compare
> 10.42% libjvm.so
> [.]
> ParNewGeneration::copy_to_survivor_space_avoiding_promotion_undo(ParScanThreadState*,
> oopDesc*, unsigned long, markOopDesc*)
> 6.78% perf-91935.map
> [.]
> Lorg/apache/hadoop/hbase/regionserver/MemStoreLABImpl;::copyCellInto
> ....
> {code}
> These are top CPU consumers using perf-map-agent ./bin/perf-java-top...
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