Monitoring Tomcat and Alerting

[Juan Rosero]

Hello,

I need to monitor a Tomcat application and deployed the jmx_exporter with the tomcat.yml sample file. I'm able to monitor the memory used and also would like to monitor the garbage collection, threads and classes, but I don't know how to go about it. Can someone advise please?

  - alert: JvmMemoryWarning

    expr: jvm_memory_bytes_used{area="heap"} / jvm_memory_bytes_max{area="heap"} * 100 > 80

    for: 5m

    labels:

      severity: warning

    annotations:

      summary: "JVM memory filling up on {{ $labels.instance }}"

      description: "JVM memory is over 80%."

Thank you,