Standalone JVM Monitoring Plugin

Stackdriver Monitoring can monitor Java Virtual Machine processes for common Java metrics.

Discovery

JVM metrics are collected when you configure one or more of the following Java-based plugins with Stackdriver Monitoring:

JVM metrics are displayed on the JVM Services page in the Resources menu. After you install the monitoring agent and configure one of the Java-based plugins, Stackdriver Monitoring populates the JVM Services page with inventory and metrics.

Configuring Stackdriver Monitoring to monitor Java VMs

After you install the monitoring agent, use the following instructions to configure the JVM plugin on your instances. For instructions on upgrading from the legacy jmxtrans monitoring, see Upgrading from jmxtrans below.

Prerequisites

The JVM plugin requires version 5.5.0-257 or later of the monitoring agent. To update the agent, see Upgrading the agent.

Enabling the JVM monitoring plugin

Java Virtual Machines are monitored via JMX.

On your VM instance, download jvm-sun-hotspot.conf from the GitHub configuration repository and place it in the directory /opt/stackdriver/collectd/etc/collectd.d/:

(cd /opt/stackdriver/collectd/etc/collectd.d/ && curl -O https://raw.githubusercontent.com/Stackdriver/stackdriver-agent-service-configs/master/etc/collectd.d/jvm-sun-hotspot.conf)

Edit the downloaded configuration file and replace JMX_PORT by the port on which your JVM is configured to allow JMX connections.

After adding the configuration file, restart the monitoring agent by running the following command:

sudo service stackdriver-agent restart

Information on other plugin configuration options can be found at collectd.org.

What is monitored

The JVM plugin monitors the following common JVM metrics:

  • Active JVM Threads
  • JVM Heap memory usage
  • JVM Non-Heap memory usage
  • JVM Open File Descriptors
  • JVM Garbage Collection Count

Upgrading from jmxtrans

If you are currently running a VM with the legacy jmxtrans monitoring, you need to upgrade all of the Java-based plugins, namely Cassandra, HBase, Kafka, or Tomcat. After you've upgraded those plugins and restarted the stackdriver-agent service, you can shut down the jmxtrans process. You can then uninstall jmxtrans by removing the /mnt/jmxtrans tree and the /etc/init.d/jmxtrans script (if the script is present).

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