dear All,
<br />
<br />I had a Centos 5.5 OS  running for about 6 months used as a Xen VM server prfectly running 3 Virtual machines
<br />
<br />Its a Sun Blade server with 8 core Xeon Proceesor with 32 GB Ram
<br />
<br />couple of days back I added another 32 gb ram .
<br />
<br />The bios shows the added ram that is now it shows me 64 GB but the Centos OS just recognizes 32gb only
<br />
<br />the OS details are:
<br />
<br />Centos release 5.5 final
<br />Kernel 2.6.18-194.32.1.el5xen on an x86_64
<br />
<br />now also running uname -a shows me
<br />
<br />Linux hypervisor2 2.6.18-194.32.1.el5xen #1 SMP Wed Jan 5 18:44:24 EST 2011 x86_64 x86_64 x86_64 GNU/Linux
<br />
<br />shows that PAE support is not there
<br />
<br />I do believe that installing kernel PAE with yum should solve the problem but since the server is a online production server just wanted to verify if I would run into some problems
<br />
<br />apprecite your kinf help and suggestions
<br />
<br />regards
<br />
<br />
<br />sylvan