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Monitoring JAVA on Instances

Overview#

JVM on instances is monitored using sfAgent configured with jvm plugin. The plugin monitors JVM metrics, jvm arguments used to start Java process and deadlock metrics. JVM plugin internally uses the following utilities to collect metrics:

  • Jstats for JVM metrics
  • Jolokia will be started by plugin to collect deadlock metrics if monitor Deadlocks parameter is set in configuration file

Pre-requisites#

Jcmd has to be installed in the instance

Configuration#

sfAgent section provides steps to install and automatically generate plugin configurations. User can also manually add the configuration shown below to config.yaml under /opt/sfagent/ directory 

- name: jvm   enabled: true   interval: 60   config:          process: *         #process that needs to be monitored          heapInterval: 3600     # polling interval to collect jvm arguments passed to the process          monitorDeadlocks: false    #enable/disable deadlock monitoring          deadLockMonitoringInterval: 300    #polling interval for deadlock monitoring.

Viewing data and dashboards#

  • Data generated by this plugin can be viewed in “browse data” page inside the respective application under plugin=jvm and documentType=jvm

  • Dashboard for this data can be instantiated by importing dashboard template “JVM” to the application dashboard.