> From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On > Behalf Of Edward Ned Harvey (centos) > > According to these, centos 6 and rhel 6 are limited to 16G of ram. But I > currently have a rhel6 system with 128G, so ... Don't know what to think > about that... Gaah! Sorry. I looked at x86 and not x86_64. So that answers that. But the question still stands - In the past, I think there was a limitation of RHEL ES, and if you went over that, you needed RHEL AS. As far as I can tell, there is no such distinction (and never has been) in centos. For that matter, as I browse redhat.com right now, it's not clear that they have any such distinction anymore either.