RHEL 5.1 (32 bit) shows 3GB RAM though there's 16GB physical

[sunhux G]

For other RHEL servers that shows the RAM amt correctly,
"uname -a" & "dmesg" show the following :

# uname -a
Linux SvrWith_8GBRam 2.6.9-67.0.7.ELsmp #1 SMP Wed Feb 27 04:48:20 EST 2008
i686 i686 i386 GNU/Linux

# dmesg | grep -i mem
8320MB HIGHMEM available.


For the "weird" server, the uname, dmesg & top are as follows :
(I'll collect "dmidecode | grep -e Memory\ Device$ -A5" tomorrow)

# uname -a
Linux SvrWith_3GbRam 2.6.18-53.el5 #1 SMP Wed Oct 10 16:34:02 EDT 2007 i686
i686 i386 GNU/Linux

# dmesg | grep -i mem
3200MB HIGHMEM available.
896MB LOWMEM available.
Memory for crash kernel (0x0 to 0x0) notwithin permissible range
  HighMem zone: 819200 pages, LIFO batch:31
Memory: 3365612k/4194304k available (2080k kernel code, 40228k reserved,
869k data, 220k init, 2489644k highmem)
Freeing initrd memory: 2468k freed
  MEM window: f2000000-f5ffffff
  MEM window: f6000000-f60fffff
  MEM window: disabled.  <== anything wrong with this?
  MEM window: disabled.  <== anything wrong with this?
  MEM window: disabled.  <== anything wrong with this?
  MEM window: disabled.  <== anything wrong with this?
  MEM window: disabled.  <== anything wrong with this?
  MEM window: disabled.  <== anything wrong with this?
  MEM window: disabled.  <== anything wrong with this?
  MEM window: disabled.  <== anything wrong with this?
highmem bounce pool size: 64 pages


top - 00:18:20 up 3 days, 12:32,  2 users,  load average: 0.14, 0.07, 0.02
Tasks: 155 total,   1 running, 154 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.0%us,  0.2%sy,  0.0%ni, 99.8%id,  0.0%wa,  0.0%hi,  0.0%si,
 0.0%st
Mem:   3369208k total,  3284572k used,    84636k free,   185648k buffers
Swap:  8193108k total,      200k used,  8192908k free,  2756496k cached


# more /proc/meminfo
MemTotal:      3369208 kB
MemFree:         84760 kB
Buffers:        185668 kB
Cached:        2756484 kB
SwapCached:          0 kB
Active:         508672 kB
Inactive:      2635140 kB
HighTotal:     2489644 kB
HighFree:        12244 kB
LowTotal:       879564 kB
LowFree:         72516 kB
SwapTotal:     8193108 kB
SwapFree:      8192908 kB


On Wed, Dec 23, 2009 at 8:35 AM, Ramakrishnan Seshadhri <
ramakrishnan42 at gmail.com> wrote:

> Hi,
>
> What is your Linux Kernel Version. Is it a PAE kernel (Physical Address
> xtension)
>
> Provide the output of  # uname -a.
>
> If your kernel is not a PAE kernel it wont detect your physical memory more
> than 3072 MB.
>
> Hope it helps your situation.
>
> Ram
>
> On Tue, Dec 22, 2009 at 10:32 PM, Eugene Vilensky <evilensky at gmail.com
> >wrote:
>
> > >> why is "top" or "dmesg" showing only 3GB RAM
> > >> instead of 4GB if 4GB is the max the 32 bit RHEL
> > >> can support?
> > >>
> > >> Supposedly there's 16GB physical RAM inserted
> > >> in the hardware
> >
> > Could you copy/paste your exact top output as well as the output of
> > "dmidecode | grep -e Memory\ Device$ -A5"
> >
> > --
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> > https://www.redhat.com/mailman/listinfo/redhat-list
> >
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