max_mem_window kernel parameter

[wvsa]

Fellow admins,

Have a hpux server with 6 oracle instances. Having a problems keeping a all of the instances up and running. Oracle's metalink tells me the problem is with the max_mem_window kernel parameter. Ok the current value of this parameter is 0. Based on what I have got going on this server can anyone give me some wisdom as to what the parameter should be. Thankyou for your input.

[David_246]

Sorry to tell, but just checked our server running aprox 12 instances and the param is also zero.

Not a solution, but it is a compare like you asked :(


Regs David

[John Palmer · Accepted solution]

Memory windows allow you to have several different 'global' shared memory segments. Have a look at the white paper on your server /usr/share/doc/mem_wndws.txt.

Regards,
John

[Jeff Schussele]

Hi,

That's strange.
If it's zero - you should be ONLY able to use the default window.

David - those 12 have to all be in the default window, I'd think.

So I'd advise that you define a few more (10?) for max_mem_window than you currently need to avoid reboots down the road if it turns up you need 7, 8, etc.

Rgds,
Jeff