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@xxxxxxxxx> 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@xxxxxxxxx > >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" > > > > -- > > redhat-list mailing list > > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > > https://www.redhat.com/mailman/listinfo/redhat-list > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
