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A Cloud Guru

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

Level

Beginner

Duration

15m

Published

Jan 24, 2020

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.
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
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.
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
```

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

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.