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https://issues.apache.org/jira/browse/HDDS-4442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang updated HDDS-4442:
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Attachment: Screen Shot 2020-11-09 at 12.29.34 PM.png
> 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
> Priority: Major
> Attachments: Screen Shot 2020-11-09 at 10.54.05 AM.png, Screen Shot
> 2020-11-09 at 12.29.34 PM.png
>
>
> 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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