Memory Shared vs Memory Shared Common

[gogogo5]

Please can someone define what the difference is between Memory Shared and Memory Shared Common? If you can give an example it would help me to understand.

cheers

[acr]

this may help..

http://www.vmware.com/support/esx21/doc/esx21admin_memory_server.html

Virtual Machines — memory currently allocated to virtual machines

Shared Common — memory required for the single copy of memory shared between virtual machines[/b]

Virtualization — total virtualization overhead for all virtual machines and the vmkernel

Service Console — memory allocated to the Service Console

Free — memory currently available to be used by the system or virtual machines

Total — total physical memory on the server

[gogogo5]

hey acr, thanks.

I understand the concept of memory shared common (I guess this is the transparent page sharing here) but wondered what just the "memory shared" metric is. If its "shared" wouldn't it be common anyway?

[FredPeterson]

This is my understanding, someone please correct me if I am wrong.[/i]

Shared Common is the memory foot print of the TPS pool and "Shared" is the savings total because of the TPS, memory that would otherwise be required.

Its best to understand it by looking at the stacked graph option in the performance graph of a host and select all of the VM's and select the "Memory Shared" resource.