stack created HBASE-20875: ----------------------------- Summary: 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
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)