A. For most ESX 4.x environments, the default 358MB of RAM is enough to handle the needs of the Service Console. But in some situations, you may find that you need additional horsepower to get the job done. This can be because you've installed additional software to the ESX host or because you're running custom processes that require extra RAM.
To change the amount of RAM assigned to an ESX host's Service Console, first log into the vCenter Client and select the ESX host from the inventory. Click the Configuration tab, followed by Memory, and then Properties. In the resulting window, enter a new value for the amount of assigned RAM. This value must be between 256MB and 800MB. Click OK and reboot the host to complete the assignment.