Java Troubleshooting Guide for HP-UX Systems

2 Useful System Tools for Java Troubleshooting

This chapter contains information about HP-UX system tools that are useful when troubleshooting

Java application problems. The tools discussed include: GlancePlus, tusc, Prospect, HP Caliper,

sar, vmstat, iostat, swapinfo, top, netstat, and others.

2.1 GlancePlus

GlancePlus is a system performance monitoring and diagnostic tool. It lets you easily examine

system activities, identify and resolve performance bottlenecks, and tune your system for more

efficient operation. For more information on GlancePlus, refer to the following webpage:

http://www.managementsoftware.hp.com/products/gplus/index.html

2.2 tusc

tusc gives you another view into the system activity, in addition to Java stack traces, GlancePlus,

and HPjmeter. It has many options, which you can display by entering the command tusc

-help. For more information on tusc, refer to the following webpage:

http://h21007.www2.hp.com/dspp/tech/tech_TechDocumentDetailPage_IDX/

1,1701,2894,00.html?jumpid=reg_R1002_USEN

2.3 Prospect

IMPORTANT: Prospect is supported only on PA-RISC platforms.

Prospect is a performance analysis tool. Beginning with Prospect revision 2.2.0, you can use

Prospect to retrieve a profile of the compiled Java methods that the Java VM compiler creates in

data space. To activate this functionality, you must have SDK 1.3.1.02, or later, releases. For more

information on the Prospect performance analysis tool, refer to the following webpage:

http://www.hp.com/go/prospect

2.4 HP Caliper

HP Caliper is a general-purpose performance analysis tool for applications running on Integrity

systems. It helps you understand the execution of your applications and identify ways to improve

their performance. For more information on the HP Caliper tool, refer to the following webpage:

http://www.hp.com/go/caliper

2.5 sar

The sar command is a tool to report various system activities, such as processor, I/O, context

switches, interrupts, page faults, and other kernel actions. For more information on this command,

refer to the following webpage:

http://docs.hp.com/en/B2355-60127/sar.1M.html

2.6 vmstat

The vmstat command reports statistics about the process, virtual memory, trap, and processor

activity. For more information on this command, refer to the following webpage:

http://docs.hp.com/en/B2355-60127/vmstat.1.html

2.1 GlancePlus 55