Choosing a JVM

In order to run Oracle WebLogic Server, you'll need a Java Virtual Machine (JVM). Oracle offers two types of JVMs for you when you install Oracle WebLogic Server—the Sun Hotspot JVM and the Oracle JRockit JVM. Oracle recommends that you use the JRockit JVM for production installations because of the many benefits offered by it, including higher performance, increased scalability, and better manageability when compared to the Sun JVM.

You configure the default JVM for a domain when creating a domain with the Configuration Wizard or with the WebLogic Scripting Tool (WLST). If you choose Production Mode on the Configure Server Start Mode and JDK page during the Configuration Wizard's domain creation process, the choice of the JVM will default to the JRockit SDK. If you select Development Mode, on the other hand, your domain will be configured to use the Sun SDK.