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...
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