kernel parameter HP-UX 11.00

[Paul Alain]

Which kernel parameter sets the shared memory "system-imposed maximum segment size" ?
Curently our maximum segment size is set to 134217728 (128MB). How can i increase this setting?

[Alex Glennie]

shmmax Maximum shared memory segment size
Minimum: 2 Kbytes
Maximum: 1792 Mbytes Default: 0x04000000 (64 Mbytes)

use sam to increase ?

[Dieter Degrendele_1]

Hi,

You can change the kernel parameters in SAM.

sam
kernel configuration
configurable parameters
shmmax (max shared mem segment in bytes)

Remark,
You will have to reboot your machine to apply the changes you made to the kernel. (Why am I feeling as if I am working with Micro$oft products?)


Rdgs,
DD

[James R. Ferguson]

Hi Paul:

To the above contributions, I would also add that SAM has inbuilt help to guide you in the appropriate selection of kernel paramater values. SAM also "knows" the rules and ranges appropriate for the various parameters, and thus is a very safe, effieient way of adjusting them.

Here is a good document describing HP-UX kernel parameters, too:

http://docs.hp.com/hpux/onlinedocs/os/KCparams.OverviewAll.html

...JRF...