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

[ESGLinux]

Hi,

just one thing, in my servers with 32 bits I need to install de kernel PAE
as they have said you:

 uname -a
Linux server 2.6.18-164.el5PAE #1 SMP Tue Aug 18 15:59:11 EDT 2009 i686 i686
i386 GNU/Linux

rpm -qa | grep -i pae
kernel-PAE-2.6.18-128.1.14.el5
kernel-PAE-2.6.18-164.el5
kernel-PAE-2.6.18-128.1.1.el5

I think you need this kind of kernel, I don´t know why other servers show
you the memory correctly

Greetings

ESG

2009/12/23 sunhux G <sunhux at gmail.com>

> 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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