topic Memory Quadrants in Operating System - HP-UX

Memory Quadrants

Nobody's Hero — Thu, 11 Jul 2002 12:02:24 GMT

I have an N class running 4 Oracle instances. When trying to start a process scheduler, I get a "call to mmap failed". I understand you can use an HP-UX feature called memory windowing by using different quadrants for shared memory. Can someone explain this feature? How would I tell oracle to use a different quadrant?

Re: Memory Quadrants

PIYUSH D. PATEL — Tue, 18 May 2021 13:07:30 GMT

Hi,

Go thro this technical paper on memory windows

http://docs.hp.com/hpux/onlinedocs/os/memwn1_4.pdf

Piyush

Re: Memory Quadrants

PIYUSH D. PATEL — Thu, 11 Jul 2002 12:17:18 GMT

Hi,

Also go thro the follwing link...

It also tell you how to make the memory windowing feature.

http://support2.itrc.hp.com/service/cki/docDisplay.do?docId=200000048912928

Piyush

Re: Memory Quadrants

Dave Wherry — Fri, 12 Jul 2002 17:27:32 GMT

What version of UX and what version of Oracle are you running? If you have them both on 64 bit versions you would not need memory windows.

Re: Memory Quadrants

MANOJ SRIVASTAVA — Fri, 12 Jul 2002 17:42:21 GMT

Hi Robert

Also you may like to look at this too :

http://supportweb.remedy.com/supportweb/Documentation/PDF/technotes/doc1371.pdf

Manoj Srivastava

Re: Memory Quadrants

Nobody's Hero — Fri, 12 Jul 2002 17:44:56 GMT

Hey Dave,

I am running 11.0 64bit OS and the DBA's loaded Oracle 8.1.6 32 bit. Am I limited because of the 32 bit Oracle?

Re: Memory Quadrants

MANOJ SRIVASTAVA — Fri, 12 Jul 2002 17:50:57 GMT

Hi Robert

Yes that is true , you can load a 64 bit version of oracle , more can be read from :

http://docs.hp.com/hpux/onlinedocs/os/memwn1_4.pdf

Manoj Srivastava

Re: Memory Quadrants

PIYUSH D. PATEL — Fri, 12 Jul 2002 17:53:22 GMT

Hi,

Your OS is 64 bit and hence you will not have to make any changes in the OS. Oracle 32 bit has a limitation. You can load Oracle 64 bit.

Piyush

Re: Memory Quadrants

Dave Wherry — Mon, 15 Jul 2002 13:00:06 GMT

You have the 32 bit memory limitation for your Oracle instance. If you have other applications also on this system you could put Oracle in one memroy window and the other applications in other memory windows. My feeling is that would be more trouble than it's worth. Ask your DBA's to try and get Oracle up to 64 bit and these memory limitation go away.