Fedora has a PAE kernel which is useful in instances like this, what would be the CentOS alternative to that? -Drew -----Original Message----- From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Kanwar Ranbir Sandhu Sent: Monday, March 05, 2007 11:47 AM To: CentOS mailing list Subject: [CentOS] CentOS 4.4 not seeing all RAM Hi Everyone, My server is only seeing 4.8 GB out of 6 GB available. I don't know why. I have a CentOS 4.4 x86_64 server running on a Tyan s2895 with 6 GB of RAM (two 1 GB sticks and 2 2 GB sticks). I upgraded the RAM, powered up the server, and when CentOS was finished booting, checked the available RAM with free. This is what it's reporting: total used free shared buffers cached Mem: 4809064 4769492 39572 0 197156 3127704 -/+ buffers/cache: 1444632 3364432 Swap: 2064376 176 2064200 The BIOS sees all of the RAM. In fact, it looks to me like the kernel knows 6 GB is available. But, it is only using 4.8 GB because I see this in dmesg: Memory: 4808464k/6291456k available (2106k kernel code, 0k reserved, 1299k data, 196k init) What happened to the other 1 GB+ of RAM? BTW, the server isn't running all the newest updates, but it is running the latest CentOS 4 kernel (2.6.9-42.0.10.ELsmp). Regards, Ranbir -- Kanwar Ranbir Sandhu Linux 2.6.19-1.2911.fc6 i686 GNU/Linux 11:39:08 up 2 days, 10:28, 2 users, load average: 1.18, 0.64, 0.60 _______________________________________________ CentOS mailing list CentOS at centos.org http://lists.centos.org/mailman/listinfo/centos