Java Memory Management on HP-UX

page 62/8/2005

Enabling 3

and 4

quadrants for private

data

PA-RISC

• ‘chatr +q3p enable <program>’ - an extra 1Gb of private data

is made available to a process (Both SHARED_MAGIC and

EXEC_MAGIC program can have quadrant 3 and quadrant 4

private). You cannot access shared objects available to other

programs in their quadrant 3 when you enable this option.

• ‘chatr +q4p enable <program>’ - this changes quadrants 3 and

4 to be private. You cannot access any shared memory or

shared mmap'ed files available to other programs.

Before using q3 or q4 private programs check and see if there

are patches that are needed.

ITANIUM (11.23)

• `chatr +as mpas <program>’ will enable all quadrants to be private.