Java Troubleshooting Guide for HP-UX Systems

maxfiles_lim 2*1024
maxdsiz 2000*1024*1024
The following example uses HPjconfig to display tunables that are set to values less than those
recommended:
$ java -jar HPjconfig.jar
-nogui -tunables -listmis
Log written to HPjconfig_mutant_20060915_040955.log
List of tunables whose values are less than the recommended values:
Name Recommended value
max_thread_proc 3000
maxdsiz 2000*1024*1024
The following example shows the log file contents that are produced by HPjconfig:
$ more HPjconfig_server1_20060915_042600.log
Fri Sep 15 16:26:00 PDT 2006
HPjconfig 3.0.01 (Thu Jul 21 14:52:47 2005)
Machine name: server1
IP address: 15.244.94.25
System type: ia64 hp server rx5670
Architecture: IA64N
OS name: HP-UX
OS version: B.11.23
Processors: 4
Java version: 1.4
Reading required patches/tunables information from /tmp/HPjconfig.xml
Read required patches/tunables information
Reading patch list from system
Read patch list from system
List of required patches:
PHCO_30476 supports HPjmeter profiling of unbound (MxN) threads.
PHKL_30192 solves kernel panic with thousands of MxN threads.
PHSS_30015 solves problem with Aries signal handling that overlaps Java signal handling.
PHSS_34201 solves problem emulating floating point conversion when running
PA2.0 Java on an IPF system.. solves problem with Aries signal
handling that overlaps Java signal handling. solves problem
emulating floating point conversion when running PA2.0 Java on
an IPF system.. solves problem with Aries signal handling that
overlaps Java signal handling.
1.7 HPjmeter
The latest version of HPjmeter can be downloaded from: :
http://www.hp.com/go/hpjmeter
HPjmeter can be used to identify and diagnose performance problems in Java applications
running on HP-UX. It can be used for both static and dynamic data analysis. For static data
analysis, HPjmeter can analyze profile, GC or heap data generated by the following
command-line options:
• -Xeprof
• -Xverbosegc
• -Xloggc
• -XX:+HeapDump
• -XX:+HeapDumpOnCtrlBreak
• -XX:+HeapDumpOnOutOfMemoryError
• -XX:+HeapDumpOnly
• -Xrunhprof
When using JDK 1.5.04 or later, the Java VM can generate an Xeprof file using zero preparation
(no command-line option required). HPjmeter can also perform dynamic data analysis with
real-time monitoring of Java applications.
The following table lists the features of HPjmeter 3.1. The first two rows are static features and
the remaining four rows are dynamic features.
1.7 HPjmeter 25