Chapter 4. JVM Memory

This chapter looks at some of the things we can do to tune the memory settings of the Java Virtual Machine (JVM). We will look at how to perform the following actions:

• Increasing the JVM heap size

• Setting Xmx and Xms to the same value

• Setting the size of the Permanent Generation heap

• Calculating the total memory used by your application

• Viewing the memory used using JRMC for JRockit

• Viewing the memory used using VisualVM for HotSpot

• Setting the size of the thread stack