[jira] [Resolved] (SOLR-12055) Enable async logging by default

["Erick Erickson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-12055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Erick Erickson resolved SOLR-12055.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 8.1
                   master (9.0)

Including fix for ring buffer OOM

> Enable async 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
>             Fix For: master (9.0), 8.1
>
>         Attachments: SOLR-12055-rollback.patch, SOLR-12055-slh-interim1.patch, SOLR-12055-slh-interim1.patch, SOLR-12055.patch, SOLR-12055.patch, SOLR-12055.patch, SOLR-12055.patch, SOLR-12055.patch
>
>
> When SOLR-7887 is done, switching to async 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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