It may come as a surprise to some of you, but with the newest PC equipped with more than 1 gigabyte of DRAM, the 32-bit version of the Linux kernel is usually showing issues around the use of 2-4GB of central RAM.
It appears that it’s only a matter of checking the kernel configuration to go further. All the details in “Got more than a gig of RAM and 32-bit Linux? Here’s how to use it“.