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Posted to dev@hbase.apache.org by "Matteo Bertozzi (JIRA)" <ji...@apache.org> on 2013/02/17 11:37:12 UTC

[jira] [Created] (HBASE-7868) HFile performance regression 92/94

Matteo Bertozzi created HBASE-7868:
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             Summary: HFile performance regression 92/94
                 Key: HBASE-7868
                 URL: https://issues.apache.org/jira/browse/HBASE-7868
             Project: HBase
          Issue Type: Bug
          Components: io
    Affects Versions: 0.94.5
            Reporter: Matteo Bertozzi
            Assignee: Matteo Bertozzi


By HFilePerformanceEvaluation seems that 0.94 is slower then 0.92
Looking at the profiler seems that most of the time, compared to 92, is spent in the metrics dictionary lookup. [~eclark] pointed out the new per family/block metrics.

By commenting the metrics call in HFileReaderV2, the performance seems to get better, but maybe metrics is not the only problem.

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