topic Re: Memory upgrade in Operating System - HP-UX

Memory upgrade

Iqbal Khan_2 — Wed, 04 Oct 2000 15:29:45 GMT

Hello all,
I am about to install 1GB of additional memory on a K420 box which currently have 786 MB. Please advise me as to if i should make any changes to the Kernel for this accomidation.

Re: Memory upgrade

Iqbal Khan_2 — Wed, 04 Oct 2000 15:40:43 GMT

sorry,
i forgot to say thanks for any advise.

Re: Memory upgrade

Rick Garland — Wed, 04 Oct 2000 16:17:09 GMT

Changes to the kernel will be dependent on the use of that server. Example, if running oracle the DBAs may want to increase semaphores, shared memory, etc, and utimately increase the oracle SGA. These modifications will come from your DBAs.

Re: Memory upgrade

Alan Riggs — Wed, 04 Oct 2000 16:21:09 GMT

You do not need to make any changes to the kernel for the system to use the additional memory. However, you may want to make some changes in order to get the best utilization of your new resources. Particularly, you might want to examine your shared memory allocation, your disk buffer cache, and your memory-swap. Also, you will most liely want to increase disk swap space to accomodate the potential demands from your increased RAM.

A good discussion of kernel parameters can be found at http://docs.hp.com//hpux/onlinedocs/os/KCparams.OverviewAll.html
or by doing a search for shared memory and/or kernel parameters in the forum.

Re: Memory upgrade

James R. Ferguson — Wed, 04 Oct 2000 16:50:11 GMT

Hi:

You might also want to add or increase your swap size. You should also set the kernel parameter swapmem_on=1. Configure swap devices of equal size and priority for I/O interleaving, too.

...JRF...

Re: Memory upgrade

Iqbal Khan_2 — Thu, 05 Oct 2000 11:43:32 GMT

thank you all for the responses