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https://issues.apache.org/jira/browse/SOLR-12055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16571815#comment-16571815
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Shawn Heisey commented on SOLR-12055:
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I discussed performance and async for Solr with the log4j mailing list. I'm
told that changing Root to AsyncRoot and Logger to AsyncLogger in the
configuration will fully switch us over to async. When I have a moment, I will
give it a try.
> Enable asynch logging by default
> --------------------------------
>
> Key: SOLR-12055
> URL: https://issues.apache.org/jira/browse/SOLR-12055
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: logging
> Reporter: Erick Erickson
> Assignee: Erick Erickson
> Priority: Minor
>
> When SOLR-7887 is done, switching to asynch logging will be a simple change
> to the config files for log4j2. This will reduce contention and increase
> throughput generally and logging in particular.
> There's a discussion of the pros/cons here:
> https://logging.apache.org/log4j/2.0/manual/async.html
> An alternative is to put a note in the Ref Guide about how to enable async
> logging.
> I guess even if we enable async by default the ref guide still needs a note
> about how to _disable_ it.....
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