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Jean-Marc Spaggiari commented on HBASE-7868: -------------------------------------------- Regarding --rows=20 it's because default value is 10240x1024... Which will take forever. 20 is a bit small. I'm using 100 now and test is running about 9 minutes. Which is correct. I agree that PE should be updated to call SequentialWriteTest first when required, or at least this should be specified in the documentation. I never looked at TestHFilePerformance... But I will ;) > 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, > 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira