maxdsiz exceed physical memory

[chuanpeng_1]

OS: HPUX 11.23
Server: rx2620
The system only has 1GB memory, but the customer modified the parameter maxdsiz to 2GB and hasn't backup the kernel. Now the command kctune, sam, top failed, return error message as follow:
The operation could not complete due to insufficient memory.
But the command swapinfo can run, return message:
# swapinfo
Kb Kb Kb PCT START/ Kb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 2097152 0 2097152 0% 0 - 1 /dev/vg00/lvol2
reserve - 218344 -218344
memory 1037072 376168 660904 36%


What can I do about this???

[Peter Godron]

Hi,
why is your customer changing kernel parameters? Boot to the previous kernel (/stand/vmunix.prev) and lock all root access or wash your hands of the system.

[rariasn]

Hi,

Modify kernel parameter with SAM.

# /usr/sbin/sam

-> Kernel configuracion -> Configurable parameters

- double-click "maxdsiz" parameter and put old value.

This change do reboot.

rgs,

[rariasn]

Sorry,

"...maxdsiz to 2GB and hasn't backup the kernel. Now the command kctune, sam, top failed, return error message..."

ran

[rariasn · Accepted solution]

Hi,

# cd /stand/build

#/usr/lbin/sysadm/system_prep -v -s system
NOTE: Saving the current system file at "system" to"system.prev"
NOTE: Dynamic tunable values (if applicable) have been added to "system".
NOTE: The template file has been extracted from "/stand/vmunix" It has been placed in "system" where it will be used
to build a new kernel.

Modify "maxdsiz" parameter in /stand/build/system file.

# mk_kernel -s system

# mv /stand/system /stand/system.prev

# /usr/sbin/kmupdate
# shutdown -r -y 0

rgs,

[chuanpeng_1]

Now, system dump and reboot when customer try to restart.

[rariasn]

Hi chuanpeng,

That messages appear in the console?

rariasn

[Don Morris_1]

When the machine reboots, don't let it autoboot - pause the boot process (rx is IPF, right? So when the EFI shell runs, boot to your Primary but tell it to let you interact).

Then do: hpux ls

That will show you the files/directories in /stand. The directories are your other configurations. Look for a backup or previous one (backup should be there, if I recall correctly).

Boot to the backup with: hpux backup/vmunix

If you're still having problems, it would help to see what the console displays at the problem state.