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Ubuntu 9.10(Karmic Koala) x32 bit Ram Limitation solution

Thu, 11/05/2009 - 16:58 — mareshkau

By default ubuntu 9.10 can use only 2989MB(3GB) memmory. If you have more than 3GB, you should install x64 version of ubuntu or add PAE support in kernel;
To add PAE support you can recompile kernel or
install kernel from server version of ubuntu. It's easiest way.

sudo apt-get update
sudo apt-get install linux-headers-server linux-image-server linux-server

To see amount of available memory you can use a following comand
mareshkau@mareshkau:~$ free -m
             total       used       free     shared    buffers     cached
Mem:          2989       2881        108          0         40       1564
-/+ buffers/cache:       1276       1713
Swap:         7632          0       7632

Or just System Monitor, here my system before installing a kernel with pae

here after