A. Hot adding memory allows you to add memory to a running operating instance without a reboot. This applies to both OSs installed on physical hosts and those in virtual environments.
OSs that support hot-add are listed below. Note that the version listed and higher versions are supported—Windows Server 2003 is listed, so Server 2003 SP1, SP2, and so on also support the feature.
- Server 2003 Enterprise and Datacenter x86
- Server 2003 SP1 Enterprise and Datacenter x64
- Server 2003 SP1 Itanium
- Windows Server 2008 (and R2) Enterprise and Datacenter x86 and x64 and Itanium
Note that none of these OSs support the hot-removal of memory.Related Reading:
- Q. I thought Hyper-V in Windows Server 2008 R2 allowed you to hot add and remove virtual storage, but the option isn't available in the settings of the virtual machine (VM). What's wrong?
- Q. I heard that VMware ESX allows you to overcommit memory, which means it pages out the memory of guests to a file, giving very poor performance. Is this true?
- New Features in Virtual Machine Manager 2008 R2
- IBM Renovates iSeries Hardware Lines
Check out hundreds more useful Q&As like this in John Savill's FAQ for Windows. Also, watch instructional videos made by John at ITTV.net.