Unable to set one of the kernel parameter

[Satish Y]

Dear Experts,

Recently changed some of kernel parameters on a Tru64 system in /etc/sysconfigtab and rebooted server.

All got effected except one, called new_wire_method in VM section.

I have set param new_wire_method = 1 in /etc/sysconfigtab and rebooted system, but couldn't see such parameter in output of below command:

# /sbin/sysconfig -q vm

Here is the "sizer -v" output for system.

# sizer -v
Compaq Tru64 UNIX V5.1B (Rev. 2650); Mon Aug 8 14:42:50 SGT 2005

Can anyone tell me why its happening

Cheers...
Satish.

[Vladimir Fabecic · Accepted solution]

Because in your OS version there is no more new_wire_method in VM section. It is set to 1 by default and can not be changed.
Usually this parameter change is suggested by Oracle, but do not worry, everithing is OK. It could be done on V5.1A.

[Satish Y]

Hi Vladimir,

Thanks! for quick response.
But, I can see entry for the same in other system's kernel using sysconfig command, it's running on same OS version & hardware.

Why the difference?

Cheers...
Satish.

[Vladimir Fabecic]

Difference can be patch level. With PK5 this parameter was retired. Not sure why, but maybe this system was patched directly to current PK, and other one did not. Just a gess, but this parameter is retired and has no effect on your system's behaviour at all.

Cheers

[Venkatesh BL]

This should clear up the confusion:
http://h30097.www3.hp.com/docs/patch/51B/bl26/HTML/TITLE.HTM

Look at section: 1.3.13

[Han Pilmeyer]

Note that on V5.1A, you must still use new_wire_method=0!

The tunable was removed in BL26 to avoid confusion. There is only one supported way in V5.1B BL26 (PK5) to run Oracle, which is with the use of light weight wiring (new_wire_method=1). This is now enforced by the removal of the kernel parameter.

I will accept thank you letters for this... :-)