[ https://issues.apache.org/jira/browse/HBASE-20875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-20875: -------------------------- Attachment: 0001-HBASE-20875-MemStoreLABImp-copyIntoCell-uses-7-CPU-w.patch > 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 > Reporter: stack > Priority: Major > 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... -- This message was sent by Atlassian JIRA (v7.6.3#76005)