I'm creating new virtual Linux servers on ESXi hosts. The existing systems are 32-bit RHEL with 4GB RAM. I am planning to create the new servers with 4GB RAM and run 32-bit CentOS 5.
If I want to add more RAM later I'd need to move to a PAE kernel. Is this possible / desirable ?
Is the only changed needed to install a PAE kernel and boot from it? Does everything else stay the same?