[HBASE-20875] MemStoreLABImp::copyIntoCell uses 7% CPU when writing

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.1
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.1.1, 2.0.2
• Component/s: Performance
• Hadoop Flags: Reviewed
• Assignee: Michael Stack
• Reporter: Michael Stack
• Created: 12/Jul/18 02:37
• Updated: 19/Jul/18 14:10
• Resolved: 19/Jul/18 03:42

Description

Looks like this with a PE random write loading:

 ./hbase/bin/hbase  --config ~/conf_hbase org.apache.hadoop.hbase.PerformanceEvaluation --nomapred --presplit=40  --size=30 --columns=10 --valueSize=100 randomWrite 200

... against a single server.

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
....

These are top CPU consumers using perf-map-agent ./bin/perf-java-top...

Issue Links

• links to: Review Board (master)