Patch is provided in original bug #660036. That is probably applicable for
/usr/lib/sysctl.d/00-system.conf
+++ This bug was initially created as a clone of Bug #660036 +++
Description of problem:
As per : https://bugzilla.redhat.com/show_bug.cgi?id=184820
In RHEL5, shmmax and shmall were set to the theoretical limit of the
architecture, which for x86_64 was 64G and 4G respectively. RHEL6 doesn't have
these set.