What is "private data space" refering to?

[Takeshi Sugai]

What is "private data space" refering to in HP-UX11.0 Addtional Core Enhancements Nov. 1999, Increasing Process Data Space(new) in the following:
http://docs.hp.com/dynaweb/hpux11/hpuxen1a/b2430/@Generic__BookView?DwebQuery=maxdsiz

"private data space" means Program Data or
Program Text plus Program Data in Memory Window White Paper?

"Starting with HP-UX 11.0 ACE 9911, the maximum private data space is 2 GB and 3 GB respectively." means that we can use maxdsiz to 2Gigabyte without -N option?

Thanks for any help...

[Stefan Farrelly]

There are no "segments" (plural). A program consists of:
1 code (text) segment, max size is maxtsiz
(needs to be as big as your binary.)
1 data (heap) segment, max size is maxdsiz
(default 67 megs, "max" 900 megs)
and 1 stack segment, max size is maxssiz

If the 900 meg maxdsiz is not big enough for you, an application's
virtual address space is divided into four one-gig segments. Usually one
of these segments is allocated for data, but an EXEC_MAGIC executable
can store data in its code quadrant also. Maximum data size for an
EXEC_MAGIC executable therefore approaches 1800 megs as the size of the
executable decreases.

to be safe, set maxdsiz=RAM size as HP/UX 11 has "virtually unlimited process sizes".

see /usr/share/doc/mem_mgt.txt

[Takeshi Sugai]

How about HP-UX 11.0 ACE 9911 version to take Program Data ( maxdsi)?
1 GB or 2 GB without -N option

That is what I want to know.