Java JVM Parameters Setup Guide

To configure Java Virtual Machine (JVM) parameters, you can achieve this through command line arguments or by setting environment variables in the startup script. Here are some common examples of JVM parameter configurations.

1. Specify the heap memory size: You can use the -Xms and -Xmx parameters to set the initial and maximum heap sizes of the JVM, as shown below:

java -Xms512m -Xmx1024m MyApp

1. Set permanent generation size (only applicable to versions before JDK8): You can specify the initial size and maximum size of the permanent generation using the -XX:PermSize and -XX:MaxPermSize parameters as shown below:

java -XX:PermSize=256m -XX:MaxPermSize=512m MyApp

1. To enable GC log output, you can use the parameters -XX:+PrintGCDetails and -XX:+PrintGCDateStamps, as shown below:

java -XX:+PrintGCDetails -XX:+PrintGCDateStamps MyApp

1. Set stack size: You can specify the thread stack size using the -Xss parameter as shown below:

java -Xss256k MyApp

1. To enable the JIT compiler, you can use the -XX:+TieredCompilation parameter as shown below:

java -XX:+TieredCompilation MyApp

The above are some common examples of JVM parameter configurations, which can be adjusted based on specific needs and scenarios. It is important to note that different JVM parameters may have different effects, so it is recommended to carefully understand the meaning and purpose of each parameter before configuring them.