topic Re: hpux 11i kernel parameter limitation in Operating System - HP-UX

hpux 11i kernel parameter limitation

Victor Lee — Wed, 20 Jun 2001 00:57:01 GMT

Hi

I am trying to increase the shmmax kernel parameter on an hpux 11i (or 11.11) system. The system refuses to increase it beyond the 1Gb limit. How can I increase it beyond 1Gb?
shmmax is a "dynamic" kernel parameter.

thx
victor

Re: hpux 11i kernel parameter limitation

Patrick Wallek — Wed, 20 Jun 2001 01:21:55 GMT

Here are a couple of links that should help you. Judging from the shmmax page, it appears that you are on a 32-bit system. If that is the case then 1GB is the limit.

11i Tunable Kernel Parameters:
http://docs.hp.com/hpux/onlinedocs/os/11i/kcparams/KCparams.OverviewAll.html

11i shmmax:
http://docs.hp.com/hpux/onlinedocs/os/11i/kcparams/KCparam.ShMmax.html

Re: hpux 11i kernel parameter limitation

Ravi_8 — Wed, 20 Jun 2001 05:26:46 GMT

hi,
the system os is of 32 bit, which has the limit of shmmax of 1gb. you need to convert 32bit to 64 bit(from the core os cd) and then increase the shmmax

Re: hpux 11i kernel parameter limitation

Vincenzo Restuccia — Wed, 20 Jun 2001 09:09:48 GMT

shmmax :
Maximum
0x40000000 (1024 Mbytes) on 32-bit systems
Maximum 1 Tbyte on 64-bit systems

Re: hpux 11i kernel parameter limitation

Victor Lee — Wed, 20 Jun 2001 16:51:02 GMT

Hi

thanks for all your replies. the system is an L3000. when I do "getconf KERNEL_BITS" it says 64. therefore I believe this machine to be a 64 bit machine. how does one increase shmmax on a 64 bit machine? maybe there is some file that contains kernel param limits that I need to edit?

thx
victor

Re: hpux 11i kernel parameter limitation

John Poff — Wed, 20 Jun 2001 16:57:16 GMT

Victor,

I just happened to have an L3000 in house for a couple of days. I tried setting 'shmmax' past 1Gb in sam and I got the same error message. I looked around and found this recent thread from the forum that explains how to get around it. You have to modify a file in /etc/conf/master.d to get past it.

Have fun!

JP

http://forums.itrc.hp.com/cm/QuestionAnswer/1,1150,0x571272106351d5118fef0090279cd0f9,00.html

Re: hpux 11i kernel parameter limitation

Victor Lee — Wed, 20 Jun 2001 22:11:42 GMT

Hi

modifying the file in /etc/conf/master.d
worked. many thanks to you all.

cheers
victor

Re: hpux 11i kernel parameter limitation

Roland Rottlaender — Fri, 16 May 2003 08:12:16 GMT

Hi Victor,

I've got the same problem but can not get the solution of John. Seems that the link is moved. Can you help me??

Thanks,

Roland

Re: hpux 11i kernel parameter limitation

T G Manikandan — Fri, 16 May 2003 08:42:17 GMT

This is the way

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000062908957

Re: hpux 11i kernel parameter limitation

Stefan Farrelly — Fri, 16 May 2003 08:53:45 GMT

That last link is to the US ITRC site which us Europeans cant get to without the usual logout/login problem which is very annoying. Can some US member please cut and past the info on how to get around this from the link and put it in a reply here please ?

Thanks,

Stefan

Re: hpux 11i kernel parameter limitation

Cheryl Griffin — Fri, 16 May 2003 10:40:29 GMT

Contents of documents found in the ITRC Knowledge Base should not be posted in the forums.

To access the document, log in to your normal server, access the ITRC Knowledge Base and search for document:
"SAM (11i): The value specified for tunable parameter "shmmax""
document id: KBRC00008072

Re: hpux 11i kernel parameter limitation

John Poff — Fri, 16 May 2003 12:45:00 GMT

Roland,

The link changed when the ITRC modified the URL of the pages a while back. Try this for the URL for that thread:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x571272106351d5118fef0090279cd0f9,00.html

JP

Re: hpux 11i kernel parameter limitation

Roland Rottlaender — Tue, 20 May 2003 06:47:13 GMT

Hi John,

it works.
thanks for your help.

Roland