topic Re: Kernel Question in Operating System - HP-UX

Kernel Question

Andre Lemon — Tue, 19 Dec 2006 14:50:35 GMT

I made some changes to a few parameters in the Kernel. And after rebooting the system, I see that the changes did not affect the "Current" column but the values in the "Planned" column do show the new values.

Why? Did something go wrong?

Here are the steps that I took.

cd /stand/build
# /usr/lbin/sysadm/system_prep -s system
# vi system
# cp /stand/vmunix /stand/vmunix121906
# mv /stand/system /stand/system.old
# mv /stand/vmunix /stand/vmunix.old
# cp /stand/build/system /stand
# cp /stand/build/vmunix_test /stand/vmunix
# ll /stand/vmunix
-rwxr-xr-x 1 root sys 19154032 Dec 19 14:05 /stand/vmunix
#
# cd /
# shutdown -r 0

Here is what I changed:

maxfiles 60
maxfiles_lim 1024
maxusers 100
maxvgs 16
msgseg 2048
msgssz 128
nflocks 4096
npty 200
nstrtel 200
swchunk 4096
vps_ceiling 64

Here is the listing from kmtune after.

maxusers 32 - 100

maxvgs 10 - 16

msgssz 8 - 128

Re: Kernel Question

Raj D. — Tue, 19 Dec 2006 14:58:34 GMT

Andre ,

You didnot rebuild the kernel , you have to use # ./mk_kernel to rebuild the kernel and it will be effective in next reboot.

Cheers,
Raj.

Re: Kernel Question

Raj D. — Tue, 19 Dec 2006 15:07:06 GMT

Andre,

Here how it should be,

To change the values of these,

maxfiles 60
maxfiles_lim 1024
maxusers 100
maxvgs 16
msgseg 2048
msgssz 128
nflocks 4096
npty 200
nstrtel 200
swchunk 4096
vps_ceiling 64

1.# kmtune -s maxfiles-60
# kmtune -s masfiles_lim=1024
....

2. # kmtune -q maxfiles
( To check current value and planned value.)

3. # ./mk_kernel

4. # ./kmupdate

5. # shutdown -r -y 0

6. After reboot verify the kernel paramters:
# kmtune -q maxfiles.

Hope this will help,

Cheers,
Raj.

Re: Kernel Question

Andre Lemon — Tue, 19 Dec 2006 16:05:24 GMT

#&$^!@! I skipped a step..... that sucks...

I have corrected the problem. Thanks

Andre'