Enabling Large Pages for JBoss EAP

Libraries: If you want this lab, consider one of these libraries.
Cloud

Enabling Large Pages for JBoss EAP

The JBoss Enterprise Application Server allows users to deploy and manage Java applications — and part of this management is making sure our Java apps run smoothly. For memory-intensive applications, this can mean enabling optimization features such as large pages, which locks pages in memory for faster retrieval — albeit at the expense of a non-application performance. In this lab, we enable large pages and ensure there are no memory issues in our application.

Get started Contact sales

Lab Info

Level

Beginner

Last updated

Sep 23, 2025

Duration

15m

Challenge

Enable Huge Pages via the Kernel
To enable huge pages from the kernel, we can use the sysctl command:
```
sudo sysctl -w vm.nr_hugepages=1
```

Challenge

Enable Large Pages via JBoss EAP

Move into the JBoss EAP home directory:

cd /opt/jboss-eap/

Open the standalone configuration:

sudo vim standalone/configuration/standalone.xml

Add the following under extensions:

    <system-properties>
        <property name="JAVA_OPTS" value="-XX:+UseLargePages"/>
    </system-properties>

Challenge

Restart the Service
1. Restart JBoss EAP:
```
sudo systemctl restart jboss-eap-rhel
```
1. Grep the server log for startup warnings:
```
cat standalone/log/server.log | grep WARNING
```

About the author

Pluralsight Skills

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.

Real skill practice before real-world application

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

Learn by doing

Engage hands-on with the tools and technologies you’re learning. You pick the skill, we provide the credentials and environment.

Follow your guide

All labs have detailed instructions and objectives, guiding you through the learning process and ensuring you understand every step.

Turn time into mastery

On average, you retain 75% more of your learning if you take time to practice. Hands-on labs set you up for success to make those skills stick.