Redhat 8 do not show total 4 GB ram? show 3GB only..Why?

P

My Dear friends

I have AMD server in that I Installed 4 Gb ram at boot time (POST)

it show full 4 GB ram but when Linux Redhat 8 but

in that it show only 3 GB only ..!! :shock:

so why this happend if any buddy know plese

help me..!!

Thanks in Adv..!!

M

Though I'm not sure but i think since RHL 8 is way old it might not be supporting this much amount of memory. Why don't you switch over to a newer version?

P

Its something to do with the chipset limitation i think I read someware that if u populate all four dimms with 1GB dimms the total memory recognised is less. Please see /proc/meminfo and see the details. also use free to get a quick update. Is it 3GB everywear?

P

Thanks but 4GB is installed and it show in POST also..!!

but i here from some1 that if in system have ram more then 3 GB then

kernel take 1 GB for it's own use and 3GB is for aplication....

can any but help me..!!

but i have 2 use Redhat 8 only becoz some software which support only redhat 8 only... so is there any solution...??

Actualy same problem with 2 servers...!!

so i think it's problem of Redhat 8 but is there any solution... 4 this problem..!!

ok,
RH8 supports 4GB RAM for sure. but the maximum memory that can be take up by an individual process is 3GB. You can acheive to a maximum of 3.5 GB by some kernel tweaking.

Please post the output of the following here.

Code:

$ cat /proc/meminfo

BTW, What software is woking with RH8 only ?

P

thanks 4 ur help..!!

actualy i m only install linux .. and my DBA install orecal 9i

actualy i don't know much about linux...

i have 2 install only linux... that it...

actualy my DBA told me that Redhat 8 only redhat 8 have 2 installed for orecal 9i...!!

but if i m install Fedora core 4 (latest) or mandrec or suzi linux... the new verson...

then i can get 4 GB total ram..??

so can any buddy told me Ferora core 4 support full 4 GB ram or in that also i can get only 3 GB or 3.5 GB ..? let know .. then i will try on fedora core 4 also..!!

Thanks 4 ur help..!!

2.6 kernels support upto 512 GB RAM. But i'm quite unsure about the individual process size. But in any case its over 4 GB. So that resolves your problem.

And the below tutorial will teach you how to install Oracle 9i on FC3 or higher.
*www.ibiblio.org/pub/Linux/docs/HOWTO/Oracle-9i-Fedora-3-Install-HOWTO

P

Thanks but 2.6 kernels is with fedora core 3..??

let me know then i will install fedora core 3 and let try..!! :lol:

E

pr@k@sh said:
thanks 4 ur help..!!

actualy i m only install linux .. and my DBA install orecal 9i

actualy i don't know much about linux...

We can see that from the rest of your post!

pr@k@sh said:
i have 2 install only linux... that it...

actualy my DBA told me that Redhat 8 only redhat 8 have 2 installed for orecal 9i...!!

but if i m install Fedora core 4 (latest) or mandrec or suzi linux... the new verson...

then i can get 4 GB total ram..??

so can any buddy told me Ferora core 4 support full 4 GB ram or in that also i can get only 3 GB or 3.5 GB ..? let know .. then i will try on fedora core 4 also..!!

Thanks 4 ur help..!!

It has got kernel 2.6.9.