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JVM Tuning for JBoss EAP

JBoss Enterprise Application Platform leverages a Java Virtual Machine to run its standalone server and host its applications. As we deploy our applications and leverage JBoss, we want to ensure our apps have optimal performance, and a portion of that lies in optimizing the JVM itself. In this hands-on lab, we explore a number of Java options we can set to ensure our JVM it running the best it can.

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Path Info

Clock icon Beginner
Clock icon 15m
Clock icon Jan 24, 2020

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Table of Contents

  1. Challenge

    Check for Existing JVM Settings

    See if there are any existing Java settings to consider:

    echo $JAVA_OPTS

    We can now set our options by using export on the CLI, or via the console. Let's switch to the console by going to PUBLICIP:9990 and logging in as the admin user with the password pinehead.

  2. Challenge

    Set a Fixed Heap Size

    1. Navigate to the Configuration section of the HAL Management Console, then select System Properties.

    2. Click Add on the right-hand side of the table.

    3. Set the Name filed to JAVA_OPTS and the Value field to -Xms1024M -Xmx1024M.

    4. Click Add

  3. Challenge

    Enable the G1 Garbage Collector and Aggressive Optimizations

    The additional options we need also need to be set under the JAVA_OPTS variable. Select JAVA_OPTS from the table and click Edit. Enable both the garbage collection and aggressive optimizations. The full expression should be:

    -Xms1024M -Xmx1024M -XX:+UseG1GC -XX:+AggressiveOpts

    Select Save.

  4. Challenge

    Confirm the Changes

    1. Back on the CLI, open the standalone configuration file and search for JAVA_OPTS to confirm the changes:
    vim /opt/jboss-eap/standalone/configuration/standalone.xml

    Exit the CLI with exit.

    1. Restart the server:
    sudo systemctl restart jboss-eap-rhel

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