HP-UX 11i Java™ JDK/JRE Version 6.0.22 Release Notes

unsupported behavioral option is provided to simulate the old loading behavior. The
following command-line options support old behavior:
• -XX:Flags=.hotspotrc
reverts to old behavior for .hotspotrc.
• -XX:CompileCommandFile=.hotspot_compiler
reverts to old behavior for the .hotspot_compiler.
NOTE: The implicit loading of .hotspot_compiler from the directory where libjvm
resides remains unchanged.
Option -XX:+SXTElimination enabled by default in 6.0.15
Starting in JDK/JRE 6.0.14, there is an option, -XX:+SXTElimination, that enables
a run-time compiler optimization that removes redundant sign-extension instructions from
generated code.
This option is only available in 64-bit mode. Using this option has resulted in
approximately 5% improved performance on some applications.
In 6.0.14, by default, SXTElimination is false. Starting in 6.0.15, by default,
SXTElimination is true. To turn off the optimization, add the java option:
-XX:-SXTElimination
Obsolete options
The following options have been obsoleted starting in JDK 6.0.11. In JDK 6.0.11 and
6.0.12, if these options are used, the JVM will report "Unrecognized option" and fail to
start up. Beginning in JDK 6.0.13, the JVM will issue a Warning message and proceed
to start up normally:
• -Xoptgc, -XX:MaxLiveObjectEvacuationRatio=<percent>
Starting in JDK 6.0.11, the -Xoptgc and
-XX:MaxLiveObjectEvacuationRatio options have been obsoleted.
Improvements to garbage collection make these options unnecessary.
• -XdoCloseWithReadPending
Starting in JDK 6.0.11, the -XdoCloseWithReadPending option has been
obsoleted. The purpose of this option was to work around a problem on PA-RISC
where a socket could not be closed if there was an outstanding read pending on
that socket. Java 5 and Java 6 do not require use of this option.
Lower initial RSS starting in JDK 6.0.03
Starting in JDK/JRE 6.0.03, there was a change in how the JVM commits memory. This
change applies to JVMs on 11.31 systems and to JVMs on 11.23 running with MPAS
Usage documentation 17