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javaazureazure-monitor

How to monitor Java Heap usage in Azure Monitor

How do I monitor the heap memory usage of my Java application with Azure Monitor and generate an alert when it's 90% used?

It seems that you can monitor the Heap of the JVM with Zabbix etc., but is it possible to do the same monitoring with Azure Monitor?

Solution

  • Azure recommended way is to use Azure Monitor Application Insights Java 3.0 which does not require any code change to your application. You can take a look at detailed configuration ( especially the JMX counter) here which contains the heap memory.

    <PerformanceCounters>
      <Jmx>
        <Add objectName="java.lang:type=ClassLoading" attribute="TotalLoadedClassCount" displayName="Loaded Class Count"/>
        <Add objectName="java.lang:type=Memory" attribute="HeapMemoryUsage.used" displayName="Heap Memory Usage-used" type="composite"/>
      </Jmx>
    </PerformanceCounters>

    For adding alerts on these metrics you can consult the documentation here.