LinuxQuestions.org
Register a domain and help support LQ
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Server
User Name
Password
Linux - Server This forum is for the discussion of Linux Software used in a server related context.

Notices

Reply
 
Search this Thread
Old 07-11-2007, 08:10 AM   #1
rashid68
LQ Newbie
 
Registered: Jul 2007
Posts: 8

Rep: Reputation: 0
AS 2.1 Not showing full ram


Hi Gurus

I am having an HP server running Oracle DB. Server had 4GB ram which is now upgraded to 6GB. The BIOS detected the full 6GB ram but the OS is showing only 3.5GB. I am not sure where the rest is going and how can I get it back? I want to fully utalize the available resources. Following is the output of free -m command:

total used free shared buffers cached
Mem: 3512 3507 5 536 487 1587
-/+Buf/Ca: 1432 2080
Swp: 2000 1207 792

Sorry if the answer is obvious for you but I am not a linux person. Any help would be appreciated.

RMA
 
Old 07-11-2007, 09:21 AM   #2
lord-fu
Member
 
Registered: Apr 2005
Location: Ohio
Distribution: Slackware && freeBSD
Posts: 676

Rep: Reputation: 30
Hi, not familiar with AS, but I have to compile my kernel to support anything > 4GB, most of the vanilla kernels I have only support up to 895MB?? default, I have to compile in support up to 4GB; again I am not sure about your's, just wanted to put that out there. Hope it helps some.


Welcome to Linux Questions!

Last edited by lord-fu; 07-11-2007 at 09:22 AM.
 
Old 07-12-2007, 01:57 AM   #3
rashid68
LQ Newbie
 
Registered: Jul 2007
Posts: 8

Original Poster
Rep: Reputation: 0
Thanks for the reply.

Can you please tell me which parameters I should set?

RMA
 
Old 07-13-2007, 01:49 AM   #4
rashid68
LQ Newbie
 
Registered: Jul 2007
Posts: 8

Original Poster
Rep: Reputation: 0
Will setting "mem" parameter in grub.conf help Linux using all available ram?

Thanks
 
Old 07-13-2007, 03:24 PM   #5
lord-fu
Member
 
Registered: Apr 2005
Location: Ohio
Distribution: Slackware && freeBSD
Posts: 676

Rep: Reputation: 30
Hi, I am not sure what AS 2.1 is; however on my desktop when I added 4G ram I had to recompile the kernel to allow HIGH_MEM support. If you have your kernel sources available you should be able to cat the .config file and grep for HIGH_MEM or HIGHMEM, can't remember exactly what it is.

On the other hand, we have Fedora servers at work that we have loaded with 16-32G of ram and never had to recompile a thing.

I am not sure about the grub thing, but I highly doubt it. However I may be wrong.

Hope it helps some.
 
  


Reply

Tags
help, plz


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
system only showing less then 1/2 RAM lleb Linux - Software 8 02-01-2007 04:41 PM
Xchat issue showing full IP address the-World-can-Wait Mandriva 1 06-22-2006 02:28 AM
Linux isn't showing all my RAM stormrider_may Linux - Hardware 10 01-01-2006 04:48 PM
4GB RAM not showing eddie0uk Linux - Hardware 5 03-12-2005 07:08 AM
Showing Full Path In Konsole Verbal Kint Linux - General 2 04-08-2004 02:10 AM


All times are GMT -5. The time now is 02:59 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration