Kernel Parameter can not be changed

[Subentu]

I have a Rx7620 server running HP-UX 11.23

When I try to change the kernel parameter maxssiz_64bit (through SAM) it does noty allow to change.

The current value is 0x80000000. But in the man page it says the maximum value is 0x40000000.

When I try to change it to another value (I tried several values) it gives a syntax error.

Where did I get it wrong?

Thanks

[Subentu]

The error message given is :

/usr/sam/tui/kc/tunmod.sh[50]: syntax error on line 1, /var/usr/sam/sessiondirs/root/AAAa20533/kctmp2.20606: Syntax error

[Anka]

the SAM kernel configuration tool in the TUI mode does not work correctly with hex numbers for tunables. You can use bytes instead.

But i am not sure which patch fixes the problem, may be the "kernel configuration" patch or "cumulative SAM" patch. Not sure.

[Kenan Erdey · Accepted solution]

Hi,

check typo so that you typed correctly. I try now in a 11.23 machine and SAM wants this value in bytes. If you want to change the value bigger than 0x40000000 (1 GB) and it does not allow try the patch PHKL_31500.

Kenan.

[Dennis Handly]

Why do you want to make maxssiz_64bit so large, 2 Gb?
Why not use kctune to change its value?

[Jim Butler]

Look at the values for maxt, maxs and maxd -
Make sure they do not add up to more than you total physical memory

[Dennis Handly]

>Jim: Look at the values for maxt, maxs and maxd. Make sure they do not add up to more than you total physical memory

There is no check for this and since the system uses virtual memory, you can go beyond your RAM size.