Some Java Tips

1. About JVM

Sun's Java has different Java Virtual Machines: One for the client, another one for servers. In order to get the right package with the right JVM, please note the following:

	Linux	Windows
JRE Client	in the JRE package `java -version -client`	in the JRE package `java -version -client`
JRE Server	in the JRE package `java -version -server`	in JDK Package only! `java -version -server`

Example for Windows:

C:\Programme\Java\jdk1.5.0_04\jre\bin>java -server -version
java version "1.5.0_04"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_04-b05)
Java HotSpot(TM) Server VM (build 1.5.0_04-b05, mixed mode)

Example for Linux:

plum@pieto:/tmp/penb2/java5/bin$ java -server -version
java version "1.5.0_13"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_13-b05)
Java HotSpot(TM) Server VM (build 1.5.0_13-b05, mixed mode)

2. Java Tuning

http://java.sun.com/performance/reference/whitepapers/tuning.html

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