topic Re: System-imposed value in Operating System - HP-UX

System-imposed value

Gerardo Mora — Sat, 09 Sep 2000 20:00:25 GMT

OS : HP-UX 10.20
Hardware: HP-9000 T-600

I would like to know what is the system-imposed value and how can I changed it, because has a too low value for shared memory segment size.

Thank You!
Gerardo Mora

Re: System-imposed value

James R. Ferguson — Sat, 09 Sep 2000 20:31:41 GMT

Hi:

Use SAM and to Configure Kernal Parameters. SAM has some good builtin help on the affect and range of each kernel parameter. Change your parameters with SAM. It enforces inter-parameter relationships and enables you to generate a well-tuned kernel. For additional information on kernel parameters see:

http://www.docs.hp.com/hpux/content/KCparams.OverviewAll.html

...JRF...

Re: System-imposed value

CHRIS_ANORUO — Sun, 10 Sep 2000 11:36:45 GMT

Changing shared memory values through SAM under kernel configuration will as always require a sytem reboot. See the document link and also the attached documentation.
http://www.docs.hp.com/hpux/content/KCparam.ShMemParmsOverview.html

Re: System-imposed value

Rick Garland — Sun, 10 Sep 2000 18:28:06 GMT

Using SAM to change kernel values is a better way to go. Some of the kermel values have defined ranges that SAM is aware of as opposed to modification of the /stand/build/system file. When using the system file, you are not prompted to values that may be out of range and as a result you could build a kernel that is un-bootable. SAM will tell you what the defined ranges are. There are good articles regarding kernel values and their impact on system performance. It would be a good idea to read up on the kernel values before changing. Remember, change one value and it could very well have an affect on another value. This could be an adverse affect.

Re: System-imposed value

Rick Garland — Sun, 10 Sep 2000 18:28:16 GMT