Hi Guys,
Im having RH 9.0 on my box but the problem is that my OS is only using half of the available RAM. I have 256 MB(128x2) but it uses only 128 MB of it. Im told that OS needs to be xplicitly specified about memory. Plzz Help.
Urs in Health,
Prady.

Why dont you recompile the kernel, do xconfig and look for maximum physical memory tab and see if it helps.

When you first boot your computer it does a memory check, it should say 262144 bytes if you have 256Mb of RAM. If you don't there it's not an OS problem but rather a problem with your mother board. In linux you can use the command 'dmesg' to display all system hardware properties. try something like:

user@host$ dmesg > dmesg.log

then open the file with your favorite editor and look for a line:

Memory: 157924k/162752k available (1733k kernel code, 4440k reserved, 568k data, 112k init, 0k highmem)

More or less depending on your set up. Thats the one from my machine. A stick of 128MB + a 32MB.

Also try 'free' and/or 'cat /proc/meminfo' to get more information. If this info is wrong and you need to specify the amount of system memory manually you can do so by editing your lilo.conf file, but this is only usually if your using an older machine with EISA RAM. Doing this could really mess up your OS so if this information doesn't help come back and ill tell you how to do that. Also, make sure the RAM is properly seated in the sockets on the Motherboard and check the BIOS to see the maximum memory there. Some motherboards can only handle a certain amount, mine for instance only can handle 512MB.

Hi Sinetific,
I did all, from trying to Modify Grub config file to Kernel. But funniest part is that the stick wasnt seated properly in the Slot.I know it sounds kiddish but this is true. Was just swapping HDD last week so had to remove RAM before that, seems didnt not place it properly then. Thanks for ur help. Take Care. Bye,
Urs in Health,
Prady.

I find when dealing with hardware 80% of the time it's something simple that you overlooked.