topic Re: Sytem memory diffrence in glance report in Operating System - HP-UX

Sytem memory diffrence in glance report

GTFSpanneer — Wed, 08 Dec 2010 05:52:49 GMT

Hi All,

Please see the attached document, why the system memory is diffrence in servers.both the servers are same configuration. Kindly explain,

OS HP uX 11.31
regards
panneer

Re: Sytem memory diffrence in glance report

Shibin_2 — Wed, 08 Dec 2010 06:07:57 GMT

Value of system memory is memory occupied by the kernel processes. You may compare your kernel settings on both nodes. It must be different.

To find this, use the following command.

kctune -S

Re: Sytem memory diffrence in glance report

GTFSpanneer — Wed, 08 Dec 2010 06:48:25 GMT

Hi Shibin,

i have checked , Below value difference in servers. If any impact these values for system memory diffrence.

maxdsiz 2147483648 2147483648 Immed Server A
maxdsiz 2063835136 2063835136 Immed Server B
regards
Panneer

Re: Sytem memory diffrence in glance report

Shibin_2 — Wed, 08 Dec 2010 07:47:27 GMT

Hi Paneer,

Server A has configured for maximum value ( i.e 2GB ) and server B has slightly less.

There are no issues with this. Your static data segment of process can grow up to the maximum in one server and it is slightly less to other server.

Please check your other areas of memory utilization. What processes are mainly utilizing? Is there any runaway process?

Re: Sytem memory diffrence in glance report

Bill Hassell — Wed, 08 Dec 2010 12:09:54 GMT

> maxdsiz 2147483648 2147483648 Immed Server A
> maxdsiz 2063835136 2063835136 Immed Server B

These do not occupy any space in the kernel. Since SysMem differes by 2GB, it would appear that you have some significant differences in kernel modules and settings. Start by comparing the output of kctune:

On serverA:
# kctune > /tmp/kcA
# ssh svrB /usr/sbin/kctune > /tmp/kcB

# diff /tmp/kc[AB]

Then check the modules that are in or out with kcmodule:

# kcmodule > /tmp/kmA
# ssh svrB /usr/sbin/kcmodule > /tmp/kmB

# diff /tmp/km[AB]

Now compare the system files:

# sort /stand/system > /tmp/sysAsorted
# scp svrB:/stand/system /tmp/sysB
# sort /tmp/sysB > /tmp/sysBsorted
# diff /tmp/sysAsorted /tmp/sysBsorted