I need a rather quick answer to this, so will ask the question while continuing googling: I've just upgraded the memory on an HP/Compaq DL380 G4 server running RHEL5, from 4GB to 6GB. But Red Hat only sees 4GB. A quick google tells me that I either need to install the kernel-PAE package, or the hugemem kernel. Is that correct? Yum shows me that kernel-PAE is available, but not kernel-hugemem. This server runs Oracle and is quite important to the business, so I can't just "have a go" and hope upgrading the kernel doesn't break anything. Any advice on this will be appreciated very much. grub.conf: title Red Hat Enterprise Linux Server (2.6.18-53.1.4.el5) root (hd0,0) kernel /vmlinuz-2.6.18-53.1.4.el5 ro root=/dev/VolGroup00/root rhgb quiet crashkernel=128M@16M <mailto:crashkernel=128M@16M> initrd /initrd-2.6.18-53.1.4.el5.img title Red Hat Enterprise Linux Server (2.6.18-8.el5) root (hd0,0) kernel /vmlinuz-2.6.18-8.el5 ro root=/dev/VolGroup00/root rhgb quiet crashkernel=128M@16M <mailto:crashkernel=128M@16M> initrd /initrd-2.6.18-8.el5.img Thanks. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subjecthttps://www.redhat.com/mailman/listinfo/redhat-list