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https://issues.apache.org/jira/browse/HBASE-7868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13580373#comment-13580373
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Lars Hofhansl edited comment on HBASE-7868 at 2/18/13 2:32 AM:
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Hmmm... Interesting. So with each point release 0.94 has become slower? With
the biggest drop in 0.94.4?
This is not what my testing bore out (and we also had our Phoenix team test the
releases).
Are you 100% sure you did not invert the axis?
was (Author: lhofhansl):
Hmmm... Interesting. So with each point release 0.94 has become slower?
With the biggest drop in 0.94.4?
This is not what my testing bore out (and we also had our Phoenix team test the
releases).
Are you 100% you did not invert the axis?
> HFile performance regression between 0.92 and 0.94
> --------------------------------------------------
>
> 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
> Fix For: 0.94.6
>
> Attachments: FilteredScan.png, 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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