topic Re: Kernel Parameter SHMMIN in Operating System - HP-UX

Kernel Parameter SHMMIN

Chris Xu — Fri, 14 Sep 2001 16:03:04 GMT

Please anybody's help is appreciated.
How to set the kernel parameter SHMMIN?
Thanks a lot.

Re: Kernel Parameter SHMMIN

G.Kumar — Fri, 14 Sep 2001 16:09:53 GMT

Easy way ..use SAM to change it.

Or
use kmtune -s

GK

Re: Kernel Parameter SHMMIN

James R. Ferguson — Fri, 14 Sep 2001 16:11:20 GMT

Hi Chris:

I'm going to assume your spelling is correct. If this is true, this query surfaced once before. See here, please:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,1150,0xa76a37f45ef7d4118fef0090279cd0f9,00.html

Regards!

...JRF...

Re: Kernel Parameter SHMMIN

Patrick Wallek — Fri, 14 Sep 2001 16:11:59 GMT

Any configurable kernel parameters can be set by going into SAM, then "Kernel Configuration" then "Configurable Parameters". Once you make the change SAM can recompile the kernel and reboot your box.

THe thing is, I do not see a parameter called SHMMIN. There is a SHMMNI.

Here are the configurable parameters for 11.0:
http://docs.hp.com/hpux/onlinedocs/os/KCparams.OverviewAll.html

Re: Kernel Parameter SHMMIN

Sridhar Bhaskarla — Fri, 14 Sep 2001 16:33:54 GMT

"shmmni" - Max number of shared memory segments that the system can have.

You can use different ways

-SAM
-kmtune -s
mk_kernel -o /stand/vmunix
shutdown -r y 0
-/usr/lbin/sysadm/system_prep -s /stand/system
vi /stand/system, modify shmmni
mk_kernel -o /stand/vmunix
shutdown -r y 0

You can use SAM to do the above for you.

-Sri

Re: Kernel Parameter SHMMIN

linuxfan — Fri, 14 Sep 2001 16:38:04 GMT

Hi Chris,

If you are talking about the kernel parameter SHMMNI (then you can increase it in any of the ways mentioned by other people)

But if you are talking about the parameter mentioned in the Oracle docs then this parameter only exists on Sun Machines, there is no equivalent parameter in HP

-HTH
Ramesh

Re: Kernel Parameter SHMMIN

Chris Xu — Fri, 14 Sep 2001 17:35:12 GMT

Thanks a lot for all replies.

The conclusion seems the SHMMIN parameter is not available in kernel parameter listing and it is implied without actually setting it, though Oracle support told me it is SHMMIN, not SHMMNI. Please correct me if anybody thinks different.

Again, thanks.

Re: Kernel Parameter SHMMIN

Patrick Wallek — Fri, 14 Sep 2001 17:43:24 GMT

SHMMIN does not exist on HP-UX. If Oracle is telling you that it does, then they are full of bull****.

Oracle seems to be very Sun Solaris-centric on a lot of their stuff. HP-UX seems to be an afterthought sometimes.

They need to get with the program.