Wei-Chiu Chuang created HDDS-3775:
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Summary: Add documentation for flame graph
Key: HDDS-3775
URL: https://issues.apache.org/jira/browse/HDDS-3775
Project: Hadoop Distributed Data Store
Issue Type: Task
Reporter: Wei-Chiu Chuang
HDDS-1116 added flame graph but looks like there's no documentation to enable
it.
To enable it,
add configuration hdds.profiler.endpoint.enabled = true to ozone-site.xml
download the profiler from
https://github.com/jvm-profiling-tools/async-profiler to a local directory, say
/tmp and start the DataNode with java system property
-Dasync.profiler.home=/tmp or environment variable $ASYNC_PROFILER_HOME
and then go to the datanode servlet, say dn1:9883/prof to see the graph.
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