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Posted to issues@hbase.apache.org by "Jean-Marc Spaggiari (JIRA)" <ji...@apache.org> on 2013/03/02 20:15:14 UTC
[jira] [Updated] (HBASE-7868) HFile performance regression between
0.92 and 0.94
[ https://issues.apache.org/jira/browse/HBASE-7868?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jean-Marc Spaggiari updated HBASE-7868:
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Attachment: HFilePerformanceEvaluation.txt
Matteo, can you retry?
Attached is the logs logs for the HFilePerformanceEvaluation. I have not found any noticable degradation of the performances between any of the releases.
I have not done the charts and only looked at the values (greped by test name), but it seems to be pretty stable. Anything I missed?
> 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: 0.94.7
>
> Attachments: FilteredScan.png, hfileperf-graphs.png, HFilePerformanceEvaluation.txt, performances.pdf, performances.pdf
>
>
> 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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