Hi, I'm using Logback with groovy configuration. I want to use Perf4j with Logback but I'm having problem with the groovy configuration. I want to add an AsyncCoalescingStatisticsAppender. The XML confugration looks like this. <appender name="CoalescingStatistics" class="org.perf4j.logback.AsyncCoalescingStatisticsAppender"> <param name="TimeSlice" value="60000"/> <appender-ref ref="graphExecutionTimes"/> <appender-ref ref="graphExecutionTPS"/> <!-- We add the JMX Appender reference onto the CoalescingStatistics --> <appender-ref ref="perf4jJmxAppender"/> </appender> I don't know how to translate it into groovy's configuration. Especially the the appender-ref ref part. I tried the logback.xml to logback.groovy translator to translate but it generates which I don't think it is correct. appender("CoalescingStatistics", AsyncCoalescingStatisticsAppender) { param = appender-ref = appender-ref = appender-ref = } Regards, Arsene