HP-UX 11i Version 1.6 Release Notes

HP-UX Features
Tunable Kernel Parameters
Chapter 3
48
Tunable Kernel Parameters
Tunable Kernel Parameters in HP-UX allows you to customize the behavior of the kernel
for specific environments. With dynamic tunables, it is possible to modify parameters
and see the effects immediately without the need to reboot the operating system. In
contrast, with static tunables a rebuild and reboot of the kernel is necessary.
Summary of Change
Dynamic tunable support on Itanium Processor Family (IPF) platforms has been added.
In addition, support for additional dynamic and automatic tunables is added in HP-UX
11i v1.6. Dynamic tunable values may be changed without the need to rebuild or reboot
the operating system.
Details of Change
For HP-UX 11i v1.6, Dynamic Tunable support has been added for IPF platforms.
Dynamic tunables, previously only supported on PA-RISC platforms (in HP-UX 11i),
may now be modified dynamically on IPF platforms. The tunables are:
In addition, support for additional dynamic tunables has been added for HP-UX 11i v1.6.
The additionally supported tunables:
A new tunable,
-max_acct_file_size , has been added for HP-UX 11i v1.6, and it is
dynamic as well.
Table 3-1 Dynamic Tunables
-maxfiles_lim -core_addshmem_read
-maxuprc -core_addshmem_write
-msgmax -maxtsiz
-msgmnb -maxtsiz_64bit
-semmsl -shmmax
-scsi_maxq_depth -shmseg
Table 3-2 Additionally Supported Tunables
-max_thread_proc -shmmni
-maxdsiz -maxssiz
-maxdsiz_64bit -maxssiz_64bit
-nproc -nkthread
-ksi_alloc_max