maxrsessiz(5)maxrsessiz(5)NAME
maxrsessiz, maxrsessiz_64bit - maximum size (in bytes) of the RSE stack
for any user process on the Itanium-based platform
VALUES
Default
Allowed values
DESCRIPTION
Itanium-based systems utilize a per-process register stack in main mem‐
ory (for more information see the Intel IA-64 Architecture Software
Developer's Manual, Volume 2, Chapter 6). This stack moves registers
between the physical registers and main memory and is maintained by the
Register Stack Engine (RSE). determines the size of this stack.
Who is Expected to Change This Tunable?
Anyone.
Restrictions on Changing
Changes to this tunable only take effect after a reboot of the system.
When Should the Value of This Tunable Be Raised?
should be raised if user processes are being terminated with the error
due to overflow of the RSE stack.
What Are the Side Effects of Raising the Value?
User processes will dedicate more virtual memory to the RSE stack. This
will result in less virtual memory being available for data allocation.
When Should the Value of This Tunable Be Lowered?
This tunable should be lowered only if swap space is at a premium on
the system, since virtual memory for the RSE stack still requires
matching swap reservation or allocation. Serious consideration should
be given if is being lowered below the default as this may cause unex‐
pected failures of user applications on RSE stack overflow.
This tunable is best left unchanged without complete and detailed
knowledge of the RSE stack usage of the machine workload.
What Are the Side Effects of Lowering the Value?
Lowering this tunable will limit the amount of memory available for RSE
stack usage per process. This could cause processes with large RSE
stack requirements to terminate with a error.
What Other Tunable Values Should Be Changed at the Same Time?
None.
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parame‐
ter may be removed or have its meaning changed in future releases of
HP-UX.
Installation of optional kernel software, from HP or other vendors, may
cause changes to tunable parameter values. After installation, some
tunable parameters may no longer be at the default or recommended val‐
ues. For information about the effects of installation on tunable val‐
ues, consult the documentation for the kernel software being installed.
For information about optional kernel software that was factory
installed on your system, see at
AUTHOR
was developed by HP.
SEE ALSOmaxssiz(5), maxdsiz(5), maxtsiz(5).
Itanium(R)-Based System OnlTunable Kernel Parameters maxrsessiz(5)
