I have upgrade the RAM 4GB to 8GB on my zimbra mail server. After upgrade the RAM it shows 4GB only. I asked redhat support for solving this issue, they told to install the PAE kernel. I have installed PAE kernel and boot it on this same kernel, it shows the correct size. But the zimbra mailbox service was not able to start. Kindly help me on this issue.
OS Version : RHEL 5.4 32 bit
Zimbra Version : zimbra 6.0.7_GA