HP-UX 11i Version 2 Release Notes (October 2003)

General System Administration
System Swap Space Adjustment
Chapter 4
105
System Swap Space Adjustment
With HP-UX 11i v2, VxFs enables the creation of file system sizes up to 4 TB. Files can
be a maximum of 2 TB. Because of this, you should be aware of adjustments that may be
necessary when you configure system swap space.
See “Swap Space Adjustment for Large Memory-Mapped Files” on page 116.
System-V IPC Kernel Tunable Parameter (semmap)
(Obsolete)
In the past, the semmap tunable specified the size of a System-V IPC semaphore space
resource map which tracked the free space in shared semaphore memory. There is no
such resource map anymore and the tunable is obsoleted.
Summary of Change
It is no longer necessary to tune the semmap kernel parameter. In HP-UX 11i v2, the
memory allocation of semaphore sets previously controlled by semmap is done
dynamically by the kernel. The semmap kernel parameter is no longer tunable.
Impact
You do not need to tune semmap. This parameter has been removed from the list of
tunable parameters.
Compatibility
There are no compatibility issues.
Performance
There are no performance issues.
Documentation
The semmap (5) manpage has been removed from the manpage distribution.
Obsolescence
See “Summary of Change” above.