Category
@PROCESS
None.
Purpose
Takes advantage of large pages provided on POWER4 and higher systems, for applications designed to execute in a large page memory environment.
Defaults
-qnolargepage
Usage
When using -qlargepage with a program designed for a large page environment, an increase in performance can occur. See AIX Performance Management for more information on using large page support.
Note: Performance
degradation can occur if there are too many programs attempting to
access large pages at the same time. Performance degradation can also
occur if you attempt to use -qlargepage without
meeting the hardware requirements. Use this option with discretion.
The -qlargepage compiler option only takes effect with an optimization level that turns on the optimizer; a higher optimization level may do more.
To have the linker exploit large pages as well, specify the -blpdata flag or use ledit. See the AIX® information center at URL http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp for more information.