System Tunable Mapping: Tru64 UNIX to HP-UX 11i v2

Overview
People often find that the general case for which systems are tuned fails to meet their needs. This
document provides some information on the more common parameters that are tuned for Tru64 UNIX
and the equivalent HP-UX parameters. This document provides information for HP-UX 11i v2.
On Tru64 UNIX, you can adjust the default resource limits with the dxkerneltuner or sysconfig
commands. In order for the new values to take effect, some parameters require a system reboot but it
is not necessary to rebuild the kernel.
On HP-UX, you can change the default values with the kctune command or the kcweb GUI. In order
for the changes to take effect, some parameters require a reboot but a kernel build is never required.
The document identifies which parameters require a reboot. A dynamic tunable is one whose value
can be changed without a reboot. In all the mapping tables within this document, the ‘Dynamic on
HP-UX’ column is used to indicate whether the tunable value can be changed without rebooting the
system.
For details on any of these options, see the HP-UX manpages for each tuning parameter, and the
Tru64 UNIX
sys_attrs(5) reference page as well as reference pages on attributes for each subsystem.
You can also consult the online information available at:
•
Reconfiguring the Kernel for HP-UX 11iV2
System Tuning Options
This section provides Tru64 UNIX to HP-UX tuning equivalence based on HP-UX 11i v2 for the
following attributes:
•
System V IPC Message Queue Attributes
•
System V IPC Semaphores Attributes
•
System V Shared Memory Attributes
•
Process and Thread Attributes
•
Kernel Buffer Attributes
•
Virtual Memory Attributes
•
Asynchronous I/O Attributes
System V IPC Message Queue Attributes
All the System V message queue tunables are interrelated and should not be treated as independent
variables. The tunables must be evaluated as a system to ensure that they reflect the application
requirements. For more information on tuning System V IPC message queue parameters for HP-UX,
refer to
Tuning SystemV IPC message-handling parameters on HP-UX 11i v2.
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