Re: Kernel parameters

Hi,

I am pasting here part of the installation documentation about kernel settings:

Kernel Parameter Settings for Tru64

For Tru64, use a text editor such as vi to change the kernel parameter settings in the /etc/sysconfigtab file after making a backup copy. If you have previously changed your kernel for another program to levels equal to or higher than the levels Oracle9i requires, then do not touch the settings. If the levels are too low, change them to at least as high as those in the table. If you change the settings, save the /etc/sysconfigtab file and restart the system. For example, if you need to change your SHM_MAX, SHM_MNI, SHM_SEG, PER_PROC_STACK_SIZE, and PER_PROC_DATA_SIZE parameter settings, add the following lines to the /etc/sysconfigtab file:

ipc:  shm_max = 4278190080
      shm_mni = 256
      shm_seg = 128

proc: per_proc_stack_size = 33554432
      per_proc_data_size = 201326592

Refer to the following table to determine if your system shared memory and semaphore kernel parameters are set high enough for Oracle9i.

To determine the current kernel parameter settings, use the following command:

# /sbin/sysconfig -q ipc

The parameters in the following table are the recommended values to run Oracle9i with a single database instance on Tru64.

Kernel Parameter Setting Purpose
MAX_PER_PROC_STACK_SIZE 33554432
(32 MB) Defines the processor stack size. The default size is
sufficient for Oracle9i software. If an application that shares the system with Oracle9i requires a higher per process stack size, do not set this parameter higher than 512 MB.
PER_PROC_STACK_SIZE 33554432
(32 MB)

 Defines the processor stack size. The default size is sufficient for Oracle9i software. If an application that shares the system with Oracle9i requires a higher per process stack size, do not set this parameter higher than 512 MB.
PER_PROC_DATA_SIZE 201326592
(192 MB)

 Defines the minimum per process data segment size. SHM_MAX 4278190080
(4GB less 16 MB)

 Defines the maximum allowable size of the shared memory. The SHM_MAX parameter does not affect how much shared memory is used or needed by Oracle9i, the operating system, or the operating system kernel. SHM_MIN 1 Defines the minimum allowable size of a single shared memory segment.
SHM_MNI 256 Defines the maximum number of shared memory segments in the entire system.
SHMSEG 128 Defines the maximum number of shared memory segments one process can attach.

Pl. refer
http://download-west.oracle.com/docs/html/A96167_01/pre.htm#CHDHGBGA

where all details are given.
You should have the settings as given here or more..Also go through entire manual for all details..

N. Received on Wed Sep 28 2005 - 10:06:57 CDT