Tomcat alert for "Heap Usage" > 90% of "Heap Maximum Size" in JBoss ON

Solution Verified - Updated -


  • Noticed that the Heap Usage Percentage metric is giving a value based on committed heap instead of max heap which is sending false alerts in our system. How to set a Group Alert to send an alert when "Heap Usage" > 90% of "Heap Maximum Size"


  • Red Hat JBoss Operations Network (ON) 3.3
  • Tomcat Server
  • ON Dynagroup definitions for Tomcat by Heap Size:
resource.type.plugin = Tomcat = Tomcat Server

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