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https://issues.apache.org/jira/browse/SOLR-12055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16467620#comment-16467620
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Shawn Heisey commented on SOLR-12055:
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I'm happy to provide you with some rather large logs from a 6.6.3 server that
gets mostly updates and very few queries beyond load balancer health checks. I
also have 4.x servers that DO get queries and also produce large logs. Since
they're older versions, they will not have the improvements we've already made
to reduce logging verbosity, but would hopefully provide insight for further
verbosity reduction.
> 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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