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Old 11-29-2012, 03:45 AM   #1
binub7
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Registered: Nov 2012
Posts: 2

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meminfo showing less memory


Hello Forum

I have issue with memory meminfo showing only 32G of memory, but physical 64G available !

Details below

[root@so ~]# uname -a
Linux so.pp.com 2.6.18-194.el5xen #1 SMP Tue Mar 16 22:01:26 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
[root@so ~]# uname -r
2.6.18-194.el5xen
[root@so ~]# uname -m
x86_64
[
[root@so ~]# head /proc/meminfo
MemTotal: 33554432 kB
MemFree: 32212300 kB
Buffers: 34656 kB
Cached: 303720 kB
SwapCached: 0 kB
Active: 116132 kB
Inactive: 287512 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 33554432 kB
[root@so ~]#
[root@so ~]# cat /etc/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/cciss/c0d0p3
# initrd /initrd-version.img
#boot=/dev/cciss/c0d0
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title Red Hat Enterprise Linux Server (2.6.18-194.el5xen)
root (hd0,0)
kernel /xen.gz-2.6.18-194.el5 crashkernel=128M@32M
module /vmlinuz-2.6.18-194.el5xen ro root=LABEL=/1 rhgb quiet
module /initrd-2.6.18-194.el5xen.img

Please advise how to resolve this issue...

Thanks
BB
 
Old 11-29-2012, 06:03 PM   #2
smallpond
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Registered: Feb 2011
Location: Massachusetts, USA
Distribution: CentOS 6 (pre-systemd)
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The BIOS tells the kernel how much memory is available, although the kernel also performs its own checks. What does the BIOS say?

Check /var/log/messages for the memory initialization line right after boot. Should be something like this:

Code:
Oct 29 17:04:38 smallpond kernel: [    0.000000] Memory: 2015320k/2061952k available (5470k kernel code, 46180k reserved, 2611k data, 624k init, 1156744k highmem)
I've used Linux servers with 256GB of physical memory, so I know its not a kernel limitation. I don't think Redhat adds any kind of limit.
 
Old 12-02-2012, 11:52 PM   #3
binub7
LQ Newbie
 
Registered: Nov 2012
Posts: 2

Original Poster
Rep: Reputation: Disabled
Redhat shows Less Memory

Hi, Thanks for the reply

BIOS says 64GB of physical memory and POST also shows 64GB

BB


Quote:
Originally Posted by smallpond View Post
The BIOS tells the kernel how much memory is available, although the kernel also performs its own checks. What does the BIOS say?

Check /var/log/messages for the memory initialization line right after boot. Should be something like this:

Code:
Oct 29 17:04:38 smallpond kernel: [    0.000000] Memory: 2015320k/2061952k available (5470k kernel code, 46180k reserved, 2611k data, 624k init, 1156744k highmem)
I've used Linux servers with 256GB of physical memory, so I know its not a kernel limitation. I don't think Redhat adds any kind of limit.
 
  


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