Todd Lipcon created HDFS-13702:
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Summary: 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
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.
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