Java on HP-UX 11i Frequently Asked Questions

Q: Where can I find more information about Java performance tuning on HP-UX 11i?

A: Please see our Java performance tuning website, which has a collection of tips, tools,

and techniques for helping you improve performance. Also, you can refer to the

following for additional performance tuning information:

• Java Troubleshooting Guide for HP-UX Systems (on the Business Support Center at

http://www.hp.com/go/hpux-java-docs

• HPjmeter – to identify and diagnose performance problems in Java applications

running on HP-UX (or on NonStop servers with HPjmeter 3.1):

HPjmeter Downloads and Documentation

What versions of Java are supported on HP-UX 11i?

See “Q: How do I tell what version of Java I'm running?” (page 5) for details of the

Java versions that are supported on HP-UX 11i, running on specific HP hardware.

However, because HP provides Java bug fixes via update releases and not via individual

bug fix patches, HP recommends that you always install the latest Java version.

How do HP's version numbers for Java compare with JavaSoft's versioning scheme?

See the individual release notes for the HP Java version you are running for the

equivalent Oracle version(s).

Q: How can I find out the latest bug fixes and most common bugs?

A: Known JavaSoft bugs are documented in the Oracle Bug Database at http://

bugs.sun.com/bugdatabase/ . For HP's defect fixes, see the “Problem Fixes” and “Known

Issues” sections of the release notes for the specific Java version you are running.

Q: What is the best way for me to determine what patches I need to use?

A: The best way to keep up-to-date is to refer to the HP-UX Java Patch Information

website, which is updated regularly. See the HP-UX Java Patch Information web page

at:

http://ftp.hp.com/pub/softlib/hpuxjava-patchinfo/index.html

You can also use the HPjconfig tool, which is downloadable for free from HPjconfig

Downloads and Documentation. HPjconfig can identify the required patches that are

missing from your machine and make recommendations for kernel parameter values.

Q: Are Java development tools released by HP at the same time they are released by

Sun Microsystems?

A: We are a licensee of Java from Oracle, and as such, must wait for them to provide

code to us for our porting and tuning.