Index: jackrabbit-api/src/main/java/org/apache/jackrabbit/api/jmx/EventListenerMBean.java
===================================================================
--- jackrabbit-api/src/main/java/org/apache/jackrabbit/api/jmx/EventListenerMBean.java	(revision 1754256)
+++ jackrabbit-api/src/main/java/org/apache/jackrabbit/api/jmx/EventListenerMBean.java	(working copy)
@@ -71,6 +71,9 @@
     /** Ratio of time spent in event processing */
     double getRatioOfTimeSpentProcessingEvents();
 
+    /** Ratio of time spent in event listener vs. the overall event processing */
+    double getEventConsumerTimeRatio();
+
     /** Is user information accessed without checking if an event is external? */
     boolean isUserInfoAccessedWithoutExternalsCheck();
 
Index: jackrabbit-api/src/main/java/org/apache/jackrabbit/api/jmx/package-info.java
===================================================================
--- jackrabbit-api/src/main/java/org/apache/jackrabbit/api/jmx/package-info.java	(revision 1754256)
+++ jackrabbit-api/src/main/java/org/apache/jackrabbit/api/jmx/package-info.java	(working copy)
@@ -18,5 +18,5 @@
 /**
  * JMX management interfaces for JCR.
  */
-@aQute.bnd.annotation.Version("2.1.0")
+@aQute.bnd.annotation.Version("2.2.0")
 package org.apache.jackrabbit.api.jmx;
Index: jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/commons/observation/ListenerTracker.java
===================================================================
--- jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/commons/observation/ListenerTracker.java	(revision 1754256)
+++ jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/commons/observation/ListenerTracker.java	(working copy)
@@ -279,6 +279,12 @@
                         / Math.max(currentTimeMillis() - startTime, 1);
             }
             @Override
+            public double getEventConsumerTimeRatio() {
+                double consumerTime = sum(eventConsumerTime.getValuePerSecond());
+                double producerTime = sum(eventProducerTime.getValuePerSecond());
+                return consumerTime / Math.max(consumerTime + producerTime, 1);
+            }
+            @Override
             public boolean isUserInfoAccessedWithoutExternalsCheck() {
                 return userInfoAccessedWithoutExternalsCheck.get();
             }
@@ -361,4 +367,12 @@
         }
     }
 
+    private static long sum(long[] values) {
+        long sum = 0;
+        for (long v : values) {
+            sum += v;
+        }
+        return sum;
+    }
+
 }