Oracle Database 11g Release 2 Real Application Clusters with SLVM/RAW on HP-UX Installation Cookbook, September 2010

Kernel Parameter Settings

Verify that the kernel parameters shown in the following table (Table 1) are set either to the value

shown, or to values greater than or equal to the recommended value shown. If the current value for

any parameter is higher than the value listed in this table, do not change the value of that parameter.

Table 1: Kernel Parameters

ksi_alloc_max 32768

executable_stack 0

maxfiles 1024

maxfiles_lim 63488

max_thread_proc 1024

maxdsiz 1073741824 (1 GB)

maxdsiz_64bit 2147483648 (2 GB)

maxssiz 134217728 (128 MB)

maxssiz_64bit 1073741824 (1 GB)

maxuprc 3686

msgmap 4096

msgmni 4096

msgseg 32767

msgtql 4096

ncsize 35840

nflocks 4096

ninode 34816

nkthread 7184

nproc 4096

semmni 4096

semmns 8192

semmnu 4092

semvmx 32767

nfile 126976

These kernel parameters details can change. Please refer to “Oracle Grid Infrastructure Installation

Guide 11gR2 for HPUX“ to get the latest information about these parameters.

You can modify the kernel settings either by using HP-UX System Management Homepage, kcweb

Application (/usr/sbin/kcweb -F) or by using the kctune command line utility (kmtune on

PA-RISC). For System Management Homepage, just visit http://<nodename>:2301. For kctune, you

can use below commands:

# kctune > /tmp/kctune.log (lists all current kernel settings)

# kctune tunable>=value The tunable’s value will be set to value, unless it is already greater

# kctune -D > /tmp/kctune.log (Restricts output to only those parameters which have

changes being held until next boot)