HP-UX Programmer's Guide for Java 2
Table Of Contents
- Table of Contents
- 1 Introduction
- 2 HotSpot Technology Tools and Commands
- 3 Configuration for Java™ Support
- 4 Performance and Tuning
- 5 Measuring System Performance
- 6 Using Threads
- 7 Using Signals
- 8 Using Java™ 2 JNI on HP-UX
- 9 Expanding Memory
- Determine your requirements
- Memory layout under HP-UX 11.0 (PA-RISC only)
- Additional memory available under HP-UX 11i (PA-RISC only)
- Allocating physical memory and swap in the Java™ heap
- Useful key command-line options for allocating memory
- Application-dependent considerations using large heap size HP-UX 11i PA-RISC
- Expanding heap size in native applications on PA-RISC HP-UX 11.11 and later releases
- Expanding heap size in native applications on Integrity HP-UX 11.23 and later releases
- Expanding heap size in HP-UX PA-RISC
- Expanding heap size in HP-UX Integrity
- 10 Diagnosing Memory Leaks
- A JDK/JRE 6.0.n and 7.0.n Usage Notes
- Using Java 2 JNI on HP-UX
- Garbage collection
- Asian TrueType fonts and Asian locales
- Date/Time methods defaults
- Profiling
- Compatibility with previous releases
- Java Cryptography Extension (JCE) policy files
- Configuring the Java Runtime Plug-In
- CLASSPATH environment variable
- Java Web Start technology usage
- Upgrading from a previous Java Web Start version
- IPv6 support
- Allocation Site Statistics and Zero Preparation -Xverbosegc
- JDK 6.0.04 flags
- GC log-rotation support
- NUMA collector enhancements
- ThreadDumpPath support
- Garbage-First garbage collector (-XX:+UseG1GC)
- jmap, jinfo, and jstack tools included in JDK 6.0.03
- Additional Java Web Start documentation
- B JDK/JRE 5.0.n Usage Notes
- Using Java 2 JNI on HP-UX
- Garbage collectors: Parallel and Concurrent Mark Sweep
- Allocating physical memory and swap in the Java heap
- Asian TrueType fonts and Asian locales
- Date/Time methods defaults
- Profiling
- Closing a socket (PA-RISC only)
- Compatibility with previous releases
- Java Cryptography Extension (JCE) policy files
- Allocation Site Statistics and Zero Preparation -Xverbosegc
- IPv6 support on Java 5.0
- GC log-rotation support in 5.0
- ThreadDumpPath support in 5.0
- Dynamically loaded libraries in 5.0
- Performance improvement for String.intern()
- Configuring the Java Runtime Plug-In
- CLASSPATH environment variable
- Java Web Start technology usage
- C SDK/RTE 1.4.2.n Usage Notes
- Removing support for unwanted architectures in the JRE
- Support for dynamic thread local storage (TLS)
- Signal Chaining functionality
- Using Java 2 JNI on HP-UX
- HotSpot JVM options
- Garbage collectors: Parallel and Concurrent mark sweep
- Allocating physical memory and swap in the Java heap
- Asian TrueType fonts and Asian locales
- Date/Time methods defaults
- Profiling
- Closing a socket when accept or read is pending (PA-RISC) - new patch information!
- Compatibility with previous releases
- Runtime Plug-In usage and configuration
- GC log-rotation support
- ThreadDumpPath support
- D Additional Resources
- Index
Java Web Start technology usage
Java™ Web Start is an application-deployment technology, which gives you the power
to launch full-featured applications with a single click from a web browser. It is located
in the jre directory. Some of Java Web Start's features include:
• Runs independently of any browser, so you can shut down your browser or go to
another web page and continue using your application.
• Applications deployed with Java Web Start do not require a browser interface to
operate.
• Includes security features of the Java 2 platform.
The hardware and operating system requirements for using Java Web Start are the
same as those recommended for Java SE platform implementation on which it runs.
Upgrading from a previous Java Web Start version
Do NOT uninstall your previous version of Java Web Start (if you have one) before
installing the new version. Uninstalling the previous version will cause the download
cache to be cleared and all of the previously installed Java Web Start applications will
need to be downloaded again.
This version will overwrite previous installations and automatically update browsers
to use this new release. In order to reactivate a previous version after installing this
new release, you must reinstall the old version. The configuration files and program
files folder used by Java Web Start have not changed, so all your settings will remain
intact after the upgrade.
IPv6 support
IPv6 is a set of Internet Protocol specifications designed to provide enhancements over
the capabilities of the existing IPv4 service in terms of scalability, security, mobility,
ease-of-configuration, and real-time traffic handling. Beginning with JDK 6.0.03, the
IPv6 protocol stack is the default.
For usage information, such as how to change the default IP version for JDK 6.0, see
“IPv6 support (Internet Protocol version 6) - SDK 1.4.2.x and later” (page 29). Additional
information is also available at Oracle Networking IPv6 User Guide for J2SDK/JRE 1.4.
Allocation Site Statistics and Zero Preparation -Xverbosegc
NOTE: To properly view Zero Preparation -Xverbosegc and Allocation Statistics
information, you must use HPjmeter 3.1 or later.
Starting with the 6.0.02 release, you can prompt the JVM to emit HP -Xverbosegc
information for Java applications started without -Xverbosegc. Zero Preparation
-Xverbosegc allows you to obtain -Xverbosegc information from the JVM by
sending the running Java program a SIGPROF signal. For example, assuming the
running Java process ID is 6754, then, executing either of the two actions listed below
prompts the JVM to start emitting detailed HP -Xverbosegc information:
76 JDK/JRE 6.0.n and 7.0.n Usage Notes