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From "Guanghao Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-18485) Performance issue: ClientAsyncPrefetchScanner is slower than ClientSimpleScanner
Date Mon, 31 Jul 2017 13:35:00 GMT
Guanghao Zhang created HBASE-18485:
--------------------------------------

             Summary: Performance issue: ClientAsyncPrefetchScanner is slower than ClientSimpleScanner
                 Key: HBASE-18485
                 URL: https://issues.apache.org/jira/browse/HBASE-18485
             Project: HBase
          Issue Type: Bug
            Reporter: Guanghao Zhang


Copied the test result from HBASE-17994.
{code}
./bin/hbase org.apache.hadoop.hbase.PerformanceEvaluation --rows=100000 --nomapred scan 1
./bin/hbase org.apache.hadoop.hbase.PerformanceEvaluation --rows=100000 --nomapred --asyncPrefetch=True
scan 1
{code}

Mean latency.
|| ||Test1|| Test2 || Test3 || Test4|| Test5||
|scan| 12.21 | 14.32 | 13.25 | 13.07 | 11.83 |
|scan with prefetch=True | 37.36 | 37.88 | 37.56 | 37.66 | 38.28 |




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