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Todd Lipcon commented on HDFS-13702: ------------------------------------ Not sure what's up with the above precommit. It appears like it didn't apply the latest patch, even though the console log shows it downloading from the latest URL. When I apply the patch locally and build in a clean tree, it builds OK. Any ideas? > HTrace hooks taking 10-15% CPU in DFS client when disabled > ---------------------------------------------------------- > > Key: HDFS-13702 > URL: https://issues.apache.org/jira/browse/HDFS-13702 > Project: Hadoop HDFS > Issue Type: Bug > Components: performance > Affects Versions: 3.0.0 > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Priority: Major > Attachments: hdfs-13702.patch, hdfs-13702.patch, hdfs-13702.patch > > > I am seeing DFSClient.newReaderTraceScope take ~15% CPU in a teravalidate > workload even when HTrace is disabled. This is because it stringifies several > integers. We should avoid all allocation and stringification when htrace is > disabled. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org