[CentOS] new memory not getting regonized

[John Doe]

From: "sylvan.dcunha at gmail.com" <sylvan.dcunha at gmail.com>
>I had a Centos 5.5 OS  running for about 6 months used as a Xen VM server prfectly running 3 Virtual machines 
>Its a Sun Blade server with 8 core Xeon Proceesor with 32 GB Ram 
>couple of days back I added another 32 gb ram . 
>The bios shows the added ram that is now it shows me 64 GB but the Centos OS just recognizes 32gb only 


No Xen experience but did you do this?

http://wiki.xensource.com/xenwiki/XenFaq#head-f13e54576168210e3e59c16a1f2096e93ee4ed6d

JD