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https://issues.apache.org/jira/browse/HBASE-7868?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matteo Bertozzi updated HBASE-7868:
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Description:
By HFilePerformanceEvaluation seems that 0.94 is slower then 0.92
Looking at the profiler for the Scan path, 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.
was:
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.
> 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
> Attachments: hfileperf-graphs.png
>
>
> By HFilePerformanceEvaluation seems that 0.94 is slower then 0.92
> Looking at the profiler for the Scan path, 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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