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https://issues.apache.org/jira/browse/LOG4J2-505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13875674#comment-13875674
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Remko Popma commented on LOG4J2-505:
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We could add it to the FAQ (but I'd wait until we've had more queries).
This is documented: in the Async Loggers page under _System Properties to
configure all asynchronous loggers_ and once again under _System Properties to
configure mixed asynchronous and normal loggers_:
||System Property||Default Value||Description||
|AsyncLogger.RingBufferSize|256 * 1024 |Size (number of slots) in the
RingBuffer used by the asynchronous logging subsystem. Make this value large
enough to deal with bursts of activity. The minimum size is 128. The RingBuffer
will be pre-allocated at first use and will never grow or shrink during the
life of the system.|
> Memory leak with
> org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper$Log4jEventWrapper
> ----------------------------------------------------------------------------------------------
>
> Key: LOG4J2-505
> URL: https://issues.apache.org/jira/browse/LOG4J2-505
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.0-beta9
> Reporter: Tal Liron
> Assignee: Remko Popma
> Fix For: 2.0-beta9
>
>
> Instances of this class seem to be created but never garbage collected. Here
> is a jmap dump of the problem:
> https://dl.dropboxusercontent.com/u/122806/jvm8_gc2.zip
> Use jhat to analyze it: if you go to the instance count, you will see that
> the aforementioned class is way out of control.
> Some background on how I discovered this, which may help: I am currently
> working with the Oracle OpenJDK team to debug a memory leak that has existed
> with JSR-292 (invokedynamic) that has been present since 7u40, and also
> plagues OpenJDK 8 right now. The bug is prevalent in the Nashorn engine,
> which is being shipped with JDK 8. Indeed, in the memory dump above, you'll
> see that JSR-292 and Nashorn classes are also out of control -- but still
> second to the log4j class!
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