[ https://issues.jboss.org/browse/ISPN-3076?page=com.atlassian.jira.plugin.... ] Radim Vansa commented on ISPN-3076: ----------------------------------- I think that in production the INFO level should be used as the threshold, and log4j can handle that. When debugging (tracing), I've experienced contention in log4j locks for many times, and this contention led to node unresponsiveness and consequential failure. Log4j2 is not complete cure for that, but it eliminates the bottleneck in logging framework and leaves us only in synchronization when persisting the data. Therefore, it allows to implement appender looking as the circular memory buffer. I don't think that particularly String formatting brings so much overhead. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira