Wei-Chiu Chuang created HDDS-4442:
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Summary: Disable the location information of audit logger to
reduce overhead
Key: HDDS-4442
URL: https://issues.apache.org/jira/browse/HDDS-4442
Project: Hadoop Distributed Data Store
Issue Type: Improvement
Components: OM
Affects Versions: 1.0.0
Reporter: Wei-Chiu Chuang
Log4j2 has substantial overhead with the default configuration. We found more
than 20%~30% OM overhead in a microbenchmark (in which clients sends lookupFile
calls) was spent on audit logging, even though we use async audit logger.
Note that while the log4j2 documentation states the location information is
disabled by default, we found that explicitly disabling location information
has visible performance improvement.
Solution:
add {{rootLogger.includeLocation=false}} to OM's audit logger property
(om-audit-log4j2.properties file)
After this change, the audit logger overhead reduced to 7%
According to LOG4J2-2644, log4j2 2.12.1 and above improved this. So Ozone 1.1
should be in much better shape. File this Jira for future reference.
Credit: [~adoroszlai] for identifying the solution.
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