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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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Level
Clock icon Beginner
Duration
Clock icon 15m
Last updated
Clock icon Aug 21, 2025

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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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Pluralsight Skills gives leaders confidence they have the skills needed to execute technology strategy. Technology teams can benchmark expertise across roles, speed up release cycles and build reliable, secure products. By leveraging our expert content, skill assessments and one-of-a-kind analytics, keep up with the pace of change, put the right people on the right projects and boost productivity. It's the most effective path to developing tech skills at scale.

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